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options-pricer/frontend/tracker.html

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<!doctype html>
<html lang="en" data-bs-theme="dark">
<head>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover"/>
<meta http-equiv="X-UA-Compatible" content="ie=edge"/>
<title>Options Metrics Tracker</title>
<link rel="stylesheet" href="/assets/tabler.min.css"/>
<link rel="stylesheet" href="/assets/tabler-vendors.min.css"/>
<script src="/assets/apexcharts.min.js"></script>
<script src="/assets/viewstate-store.js"></script>
<script src="/assets/alpine.min.js" defer></script>
<script src="/assets/tabler.min.js" defer></script>
<style>
:root {
--chart-bg: #1a1c23;
--chart-grid: rgba(255, 255, 255, 0.06);
--chart-label: #8b95a1;
}
body {
background-color: #1a1c23;
}
.navbar-vertical.navbar-dark {
background-color: #14161c;
border-right: 1px solid rgba(255, 255, 255, 0.07);
}
.chart-card {
background-color: var(--chart-bg);
border: 1px solid rgba(255, 255, 255, 0.07);
border-radius: 8px;
}
.apexcharts-canvas {
background: transparent !important;
}
.table-snapshots th {
font-size: 0.75rem;
text-transform: uppercase;
letter-spacing: 0.06em;
color: var(--chart-label);
font-weight: 600;
}
.toolbar-bar {
background-color: #14161c;
border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.nav-link.active-page {
color: #4fc3f7 !important;
background-color: rgba(79, 195, 247, 0.1) !important;
border-radius: 6px;
}
.badge-fat-tails {
background-color: #f59f00;
color: #1a1c23;
}
.badge-thin-tails {
background-color: #d63939;
color: #fff;
}
.badge-normal {
background-color: rgba(255, 255, 255, 0.1);
color: #8b95a1;
}
.snapshot-count-badge {
font-size: 0.7rem;
padding: 2px 8px;
border-radius: 12px;
background-color: rgba(79, 195, 247, 0.15);
color: #4fc3f7;
border: 1px solid rgba(79, 195, 247, 0.3);
font-weight: 600;
white-space: nowrap;
}
[x-cloak] { display: none !important; }
</style>
</head>
<body class="antialiased" x-data="trackerApp()" x-init="init()">
<div class="wrapper">
<!-- Vertical Sidebar -->
<aside class="navbar navbar-vertical navbar-expand-lg" data-bs-theme="dark">
<div class="container-fluid">
<!-- Toggle for mobile -->
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#sidebar-menu">
<span class="navbar-toggler-icon"></span>
</button>
<!-- Logo -->
<h1 class="navbar-brand navbar-brand-autodark">
<a href="index.html" class="text-decoration-none d-flex align-items-center gap-2">
<svg xmlns="http://www.w3.org/2000/svg" width="28" height="28" viewBox="0 0 24 24" fill="none"
stroke="#4fc3f7" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<polyline points="22 7 13.5 15.5 8.5 10.5 2 17"></polyline>
<polyline points="16 7 22 7 22 13"></polyline>
</svg>
<span class="fw-bold" style="color:#4fc3f7; font-size:1rem; letter-spacing:0.04em;">OPTIONS PRICER</span>
</a>
</h1>
<!-- Nav links -->
<div class="collapse navbar-collapse" id="sidebar-menu">
<ul class="navbar-nav pt-lg-3">
<li class="nav-item">
<a class="nav-link" href="index.html">
<span class="nav-link-icon d-md-none d-lg-inline-block">
<svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24"
fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<rect x="3" y="3" width="7" height="7"></rect><rect x="14" y="3" width="7" height="7"></rect>
<rect x="14" y="14" width="7" height="7"></rect><rect x="3" y="14" width="7" height="7"></rect>
</svg>
</span>
<span class="nav-link-title">Dashboard</span>
</a>
</li>
<li class="nav-item">
<a class="nav-link" href="chain.html">
<span class="nav-link-icon d-md-none d-lg-inline-block">
<svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24"
fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<line x1="8" y1="6" x2="21" y2="6"></line><line x1="8" y1="12" x2="21" y2="12"></line>
<line x1="8" y1="18" x2="21" y2="18"></line>
<line x1="3" y1="6" x2="3.01" y2="6"></line><line x1="3" y1="12" x2="3.01" y2="12"></line>
<line x1="3" y1="18" x2="3.01" y2="18"></line>
</svg>
</span>
<span class="nav-link-title">Options Chain</span>
</a>
</li>
<li class="nav-item">
<a class="nav-link" href="surface.html">
<span class="nav-link-icon d-md-none d-lg-inline-block">
<svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24"
fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<path d="M3 3l7 7 4-4 7 7"></path>
<path d="M21 17v4h-4"></path>
</svg>
</span>
<span class="nav-link-title">Vol Surface</span>
</a>
</li>
<li class="nav-item">
<a class="nav-link" href="strategy.html">
<span class="nav-link-icon d-md-none d-lg-inline-block">
<svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<path d="M4 19l4 -6l4 2l4 -8l4 5"></path><path d="M4 4v16h16"></path>
</svg>
</span>
<span class="nav-link-title">Strategy P/L</span>
</a>
</li>
<li class="nav-item">
<a class="nav-link" href="positions.html">
<span class="nav-link-icon d-md-none d-lg-inline-block">
<svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<path d="M5 4h4v4h-4z"/><path d="M5 12h4v8h-4z"/><path d="M13 4h4v12h-4z"/><path d="M13 18h4v2h-4z"/>
</svg>
</span>
<span class="nav-link-title">Positions</span>
</a>
</li>
<li class="nav-item">
<a class="nav-link active-page" href="tracker.html">
<span class="nav-link-icon d-md-none d-lg-inline-block">
<svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24"
fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<circle cx="12" cy="12" r="10"></circle>
<polyline points="12 6 12 12 16 14"></polyline>
</svg>
</span>
<span class="nav-link-title">Tracker</span>
</a>
</li>
<li class="nav-item">
<a class="nav-link" href="settings.html">
<span class="nav-link-icon d-md-none d-lg-inline-block">
<svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<circle cx="12" cy="12" r="3"/>
<path d="M19.4 15a1.65 1.65 0 0 0 .33 1.82l.06.06a2 2 0 1 1-2.83 2.83l-.06-.06a1.65 1.65 0 0 0-1.82-.33 1.65 1.65 0 0 0-1 1.51V21a2 2 0 1 1-4 0v-.09a1.65 1.65 0 0 0-1-1.51 1.65 1.65 0 0 0-1.82.33l-.06.06a2 2 0 1 1-2.83-2.83l.06-.06a1.65 1.65 0 0 0 .33-1.82 1.65 1.65 0 0 0-1.51-1H3a2 2 0 1 1 0-4h.09a1.65 1.65 0 0 0 1.51-1 1.65 1.65 0 0 0-.33-1.82l-.06-.06a2 2 0 1 1 2.83-2.83l.06.06a1.65 1.65 0 0 0 1.82.33H9a1.65 1.65 0 0 0 1-1.51V3a2 2 0 1 1 4 0v.09a1.65 1.65 0 0 0 1 1.51 1.65 1.65 0 0 0 1.82-.33l.06-.06a2 2 0 1 1 2.83 2.83l-.06.06a1.65 1.65 0 0 0-.33 1.82V9a1.65 1.65 0 0 0 1.51 1H21a2 2 0 1 1 0 4h-.09a1.65 1.65 0 0 0-1.51 1z"/>
</svg>
</span>
<span class="nav-link-title">Settings</span>
</a>
</li>
</ul>
</div>
</div>
</aside>
<!-- Main content -->
<div class="page-wrapper">
<!-- Toolbar -->
<div class="toolbar-bar py-2 px-3 mb-3">
<div class="container-xl">
<div class="d-flex flex-wrap align-items-center gap-3">
<!-- Symbol input -->
<div class="input-group input-group-sm" style="max-width:140px;">
<span class="input-group-text bg-dark border-secondary text-muted">Symbol</span>
<input
type="text"
class="form-control bg-dark border-secondary text-white"
placeholder="SPY"
x-model="symbol"
@keydown.enter="fetchExpirations()"
style="text-transform:uppercase;"
/>
</div>
<!-- Expiry select -->
<div class="input-group input-group-sm" style="max-width:200px;">
<span class="input-group-text bg-dark border-secondary text-muted">Expiry</span>
<select
class="form-select bg-dark border-secondary text-white"
x-model="expiry"
@change="renderCharts()"
>
<option value="">All expirations</option>
<template x-for="exp in expirations" :key="exp">
<option :value="exp" x-text="exp"></option>
</template>
</select>
</div>
<!-- Load button -->
<button
class="btn btn-sm btn-primary"
@click="loadHistory()"
:disabled="loading"
>
<span x-show="loading" class="spinner-border spinner-border-sm me-1" role="status"></span>
<span x-show="!loading">
<svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24"
fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"
class="me-1" style="vertical-align:-2px;">
<polyline points="1 4 1 10 7 10"></polyline>
<path d="M3.51 15a9 9 0 1 0 .49-3.51"></path>
</svg>
Load History
</span>
<span x-show="loading">Loading…</span>
</button>
<!-- Snapshot count badge -->
<span class="snapshot-count-badge" x-text="filteredSnapshots.length + ' snapshots'"></span>
<!-- Error message -->
<span x-show="error" x-cloak class="text-danger small ms-2" x-text="error"></span>
</div>
</div>
</div>
<!-- Page body -->
<div class="page-body">
<div class="container-xl">
<!-- Watchlist (symbols saved from Strategy page) -->
<div class="mb-3 d-flex align-items-center flex-wrap gap-2" x-show="watchlist.length > 0" x-cloak>
<span class="text-secondary small me-1">Watchlist:</span>
<template x-for="s in watchlist" :key="s">
<span class="badge bg-blue-lt" style="cursor:pointer; padding:.45rem .6rem;">
<span @click="loadSymbol(s)" x-text="s" :class="s === symbol.toUpperCase().trim() ? 'fw-bold' : ''"></span>
<span class="text-danger ms-1" style="cursor:pointer;" @click="removeWatch(s)" :title="'Remove ' + s + ' from watchlist'"></span>
</span>
</template>
</div>
<!-- Empty state -->
<div x-show="!loading && filteredSnapshots.length === 0" x-cloak class="text-center py-5">
<svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" viewBox="0 0 24 24"
fill="none" stroke="#8b95a1" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" class="mb-3">
<path d="M3 3l18 18"></path>
<path d="M21 21l-1.5-1.5M16.5 16.5L12 12M12 12L7.5 7.5M7.5 7.5L3 3"></path>
<circle cx="12" cy="12" r="10"></circle>
</svg>
<p class="text-muted">No snapshot data. Enter a symbol and click Load History.</p>
</div>
<!-- Charts row -->
<div x-show="filteredSnapshots.length > 0" x-cloak>
<div class="row g-3 mb-3">
<!-- Chart 1: ATM IV -->
<div class="col-12">
<div class="chart-card p-3">
<div class="d-flex align-items-center mb-2 gap-2">
<span style="display:inline-block;width:10px;height:10px;border-radius:50%;background:#00d4ff;"></span>
<span class="fw-semibold text-white" style="font-size:0.9rem;">ATM Implied Volatility History</span>
</div>
<div id="chart-atm-iv" style="min-height:220px;"></div>
</div>
</div>
<!-- Chart 2: RR25 + Chart 3: Fly25 side by side on wider screens -->
<div class="col-12 col-lg-6">
<div class="chart-card p-3">
<div class="d-flex align-items-center mb-2 gap-2">
<span style="display:inline-block;width:10px;height:10px;border-radius:50%;background:#2fb344;"></span>
<span class="fw-semibold text-white" style="font-size:0.9rem;">25&#916; Risk Reversal History</span>
</div>
<div id="chart-rr25" style="min-height:220px;"></div>
</div>
</div>
<div class="col-12 col-lg-6">
<div class="chart-card p-3">
<div class="d-flex align-items-center mb-2 gap-2">
<span style="display:inline-block;width:10px;height:10px;border-radius:50%;background:#f59f00;"></span>
<span class="fw-semibold text-white" style="font-size:0.9rem;">25&#916; Butterfly History</span>
</div>
<div id="chart-fly25" style="min-height:220px;"></div>
</div>
</div>
</div>
<!-- History table -->
<div class="card" style="background-color:#14161c; border:1px solid rgba(255,255,255,0.07);">
<div class="card-header d-flex align-items-center justify-content-between"
style="border-bottom:1px solid rgba(255,255,255,0.07);">
<h3 class="card-title text-white mb-0" style="font-size:0.9rem; font-weight:600;">
Snapshot History
<span class="ms-2 text-muted" style="font-size:0.75rem; font-weight:400;">
(most recent first, showing up to 20)
</span>
</h3>
</div>
<div class="table-responsive">
<table class="table table-sm table-hover table-snapshots mb-0"
style="color:#c8d3e0;">
<thead>
<tr>
<th>Timestamp</th>
<th>Expiry</th>
<th>Spot</th>
<th>ATM IV</th>
<th>RR25</th>
<th>RR10</th>
<th>Fly25</th>
<th>Butterfly Signal</th>
</tr>
</thead>
<tbody>
<template x-for="(snap, idx) in tableRows" :key="snap.timestamp + idx">
<tr>
<td class="text-muted" style="white-space:nowrap; font-size:0.8rem;"
x-text="formatTimestamp(snap.timestamp)"></td>
<td x-text="snap.expiry || '—'"></td>
<td x-text="snap.spot ? snap.spot.toFixed(2) : '—'"></td>
<td>
<span x-text="snap.atmIv ? (snap.atmIv * 100).toFixed(2) + '%' : '—'"
style="color:#4fc3f7; font-variant-numeric:tabular-nums;"></span>
</td>
<td>
<span
:style="{ color: snap.rr25 > 0 ? '#2fb344' : snap.rr25 < 0 ? '#d63939' : '#8b95a1' }"
style="font-variant-numeric:tabular-nums;"
x-text="snap.rr25 != null ? snap.rr25.toFixed(4) : '—'">
</span>
</td>
<td>
<span
:style="{ color: snap.rr10 > 0 ? '#2fb344' : snap.rr10 < 0 ? '#d63939' : '#8b95a1' }"
style="font-variant-numeric:tabular-nums;"
x-text="snap.rr10 != null ? snap.rr10.toFixed(4) : '—'">
</span>
</td>
<td style="font-variant-numeric:tabular-nums;"
x-text="snap.fly25 != null ? snap.fly25.toFixed(4) : '—'"></td>
<td>
<template x-if="snap.fly25 > 0.002">
<span class="badge badge-fat-tails">Fat Tails</span>
</template>
<template x-if="snap.fly25 <= 0.002 && snap.fly25 < -0.002">
<span class="badge badge-thin-tails">Thin Tails</span>
</template>
<template x-if="snap.fly25 != null && snap.fly25 >= -0.002 && snap.fly25 <= 0.002">
<span class="badge badge-normal">Normal</span>
</template>
<template x-if="snap.fly25 == null">
<span class="text-muted"></span>
</template>
</td>
</tr>
</template>
<tr x-show="tableRows.length === 0">
<td colspan="8" class="text-center text-muted py-3">No data available</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<!-- Alpine + ApexCharts logic -->
<script>
const CHART_DEFAULTS = {
background: 'transparent',
foreColor: '#8b95a1',
fontFamily: 'inherit',
};
const AXIS_STYLE = {
borderColor: 'rgba(255,255,255,0.06)',
labels: {
style: { colors: '#8b95a1', fontSize: '11px' }
},
axisBorder: { show: false },
axisTicks: { show: false },
};
const TOOLTIP_STYLE = {
theme: 'dark',
};
const GRID_STYLE = {
borderColor: 'rgba(255,255,255,0.06)',
strokeDashArray: 4,
};
// ── ATM IV chart ──────────────────────────────────────────────────────────
function buildAtmIvChart(data) {
const sorted = [...data].sort((a, b) => new Date(a.timestamp) - new Date(b.timestamp));
const series = sorted.map(s => ({
x: new Date(s.timestamp).getTime(),
y: s.atmIv != null ? parseFloat((s.atmIv * 100).toFixed(4)) : null,
})).filter(p => p.y !== null);
const options = {
chart: {
type: 'area',
height: 220,
toolbar: { show: false },
...CHART_DEFAULTS,
animations: { enabled: true, speed: 400 },
zoom: { enabled: false },
},
series: [{ name: 'ATM IV', data: series }],
stroke: { curve: 'smooth', width: 2, colors: ['#00d4ff'] },
fill: {
type: 'gradient',
gradient: {
shadeIntensity: 1,
opacityFrom: 0.2,
opacityTo: 0.0,
stops: [0, 100],
colorStops: [{
offset: 0,
color: '#00d4ff',
opacity: 0.2,
}, {
offset: 100,
color: '#00d4ff',
opacity: 0,
}],
},
},
colors: ['#00d4ff'],
xaxis: {
type: 'datetime',
...AXIS_STYLE,
},
yaxis: {
...AXIS_STYLE,
labels: {
style: { colors: '#8b95a1', fontSize: '11px' },
formatter: v => v != null ? v.toFixed(1) + '%' : '',
},
title: { text: 'IV (%)', style: { color: '#8b95a1', fontSize: '11px', fontWeight: 400 } },
},
grid: GRID_STYLE,
tooltip: {
...TOOLTIP_STYLE,
x: { format: 'dd MMM yy HH:mm' },
y: { formatter: v => v != null ? v.toFixed(2) + '%' : 'N/A' },
},
markers: { size: series.length <= 15 ? 4 : 0, colors: ['#00d4ff'], strokeColors: '#1a1c23', strokeWidth: 2 },
dataLabels: { enabled: false },
};
return options;
}
// ── RR25 chart ────────────────────────────────────────────────────────────
function buildRr25Chart(data) {
const sorted = [...data].sort((a, b) => new Date(a.timestamp) - new Date(b.timestamp));
const series = sorted.map(s => ({
x: new Date(s.timestamp).getTime(),
y: s.rr25 != null ? parseFloat(s.rr25.toFixed(6)) : null,
})).filter(p => p.y !== null);
const options = {
chart: {
type: 'line',
height: 220,
toolbar: { show: false },
...CHART_DEFAULTS,
animations: { enabled: true, speed: 400 },
zoom: { enabled: false },
},
series: [{ name: 'RR25', data: series }],
stroke: { curve: 'smooth', width: 2, colors: ['#2fb344'] },
colors: ['#2fb344'],
xaxis: {
type: 'datetime',
...AXIS_STYLE,
},
yaxis: {
...AXIS_STYLE,
labels: {
style: { colors: '#8b95a1', fontSize: '11px' },
formatter: v => v != null ? v.toFixed(4) : '',
},
title: { text: 'RR25', style: { color: '#8b95a1', fontSize: '11px', fontWeight: 400 } },
},
grid: GRID_STYLE,
annotations: {
yaxis: [{
y: 0,
borderColor: 'rgba(255, 255, 255, 0.25)',
strokeDashArray: 5,
label: {
text: 'Zero',
style: {
color: '#8b95a1',
background: 'transparent',
fontSize: '10px',
},
position: 'right',
},
}],
},
tooltip: {
...TOOLTIP_STYLE,
x: { format: 'dd MMM yy HH:mm' },
y: { formatter: v => v != null ? v.toFixed(4) : 'N/A' },
},
markers: { size: series.length <= 15 ? 4 : 0, colors: ['#2fb344'], strokeColors: '#1a1c23', strokeWidth: 2 },
dataLabels: { enabled: false },
};
return options;
}
// ── Fly25 chart ───────────────────────────────────────────────────────────
function buildFly25Chart(data) {
const sorted = [...data].sort((a, b) => new Date(a.timestamp) - new Date(b.timestamp));
const filtered = sorted.filter(s => s.fly25 != null);
const values = filtered.map(s => parseFloat(s.fly25.toFixed(6)));
const timestamps = filtered.map(s => new Date(s.timestamp).getTime());
const barColors = values.map(v => v > 0 ? '#f59f00' : '#6c757d');
const options = {
chart: {
type: 'bar',
height: 220,
toolbar: { show: false },
...CHART_DEFAULTS,
animations: { enabled: true, speed: 400 },
zoom: { enabled: false },
},
series: [{
name: 'Fly25',
data: filtered.map((s, i) => ({
x: timestamps[i],
y: values[i],
})),
}],
plotOptions: {
bar: {
distributed: true,
borderRadius: 2,
columnWidth: filtered.length > 30 ? '90%' : '60%',
},
},
colors: barColors,
legend: { show: false },
xaxis: {
type: 'datetime',
...AXIS_STYLE,
},
yaxis: {
...AXIS_STYLE,
labels: {
style: { colors: '#8b95a1', fontSize: '11px' },
formatter: v => v != null ? v.toFixed(4) : '',
},
title: { text: 'Fly25', style: { color: '#8b95a1', fontSize: '11px', fontWeight: 400 } },
},
grid: GRID_STYLE,
annotations: {
yaxis: [{
y: 0,
borderColor: 'rgba(255, 255, 255, 0.2)',
strokeDashArray: 4,
}],
},
tooltip: {
...TOOLTIP_STYLE,
x: { format: 'dd MMM yy HH:mm' },
y: { formatter: v => v != null ? v.toFixed(4) : 'N/A' },
},
dataLabels: { enabled: false },
};
return options;
}
// ── Alpine component ──────────────────────────────────────────────────────
function trackerApp() {
return {
symbol: 'SPY',
expiry: '',
expirations: [],
snapshots: [],
loading: false,
error: '',
watchlist: [],
_charts: { atmIv: null, rr25: null, fly25: null },
async init() {
// restore last loaded history (survives navigating away & back)
const vs = ViewState.load('tracker');
if (vs) {
this.symbol = vs.symbol ?? this.symbol;
this.expirations = vs.expirations ?? [];
this.expiry = vs.expiry ?? '';
this.snapshots = vs.snapshots ?? [];
if (this.snapshots.length) this.$nextTick(() => this.renderCharts());
}
this._loadWatchlist();
window.addEventListener('storage', (e) => { if (e.key === 'optionsPricer:watchlist') this._loadWatchlist(); });
},
_loadWatchlist() {
try { this.watchlist = JSON.parse(localStorage.getItem('optionsPricer:watchlist') || '[]'); }
catch { this.watchlist = []; }
},
loadSymbol(s) {
this.symbol = s;
this.fetchExpirations();
this.loadHistory();
},
removeWatch(s) {
this.watchlist = this.watchlist.filter(x => x !== s);
try { localStorage.setItem('optionsPricer:watchlist', JSON.stringify(this.watchlist)); } catch {}
},
_persist() {
ViewState.save('tracker', {
symbol: this.symbol, expirations: this.expirations,
expiry: this.expiry, snapshots: this.snapshots,
});
},
async fetchExpirations() {
if (!this.symbol.trim()) return;
try {
const sym = this.symbol.trim().toUpperCase();
const res = await fetch(`/api/expirations?symbol=${encodeURIComponent(sym)}`);
if (!res.ok) throw new Error('Failed to fetch expirations');
const env = await res.json();
const json = env.data ?? env;
this.expirations = Array.isArray(json) ? json : (json.expirations || []);
this._persist();
} catch (e) {
this.expirations = [];
}
},
async loadHistory() {
if (!this.symbol.trim()) return;
this.loading = true;
this.error = '';
try {
const sym = this.symbol.trim().toUpperCase();
const url = `/api/snapshots?symbol=${encodeURIComponent(sym)}&limit=100`;
const res = await fetch(url);
if (!res.ok) throw new Error(`API error ${res.status}: ${res.statusText}`);
const env = await res.json();
const json = env.data ?? env;
// Accept array or { snapshots: [...] }
this.snapshots = json.snapshots ?? (Array.isArray(json) ? json : []);
// Sort descending (most recent first)
this.snapshots.sort((a, b) => new Date(b.timestamp) - new Date(a.timestamp));
// Rebuild expiration list from data if API didn't provide it
if (this.expirations.length === 0) {
const expSet = new Set(this.snapshots.map(s => s.expiry).filter(Boolean));
this.expirations = [...expSet].sort();
}
this._persist();
this.$nextTick(() => this.renderCharts());
} catch (e) {
this.error = e.message;
this.snapshots = [];
} finally {
this.loading = false;
}
},
get filteredSnapshots() {
if (!this.expiry) return this.snapshots;
return this.snapshots.filter(s => s.expiry === this.expiry);
},
get tableRows() {
// Most recent first, limited to 20
return this.filteredSnapshots.slice(0, 20);
},
formatTimestamp(ts) {
if (!ts) return '—';
try {
const d = new Date(ts);
return d.toLocaleString('en-US', {
month: 'short', day: '2-digit',
hour: '2-digit', minute: '2-digit',
hour12: false,
});
} catch {
return ts;
}
},
renderCharts() {
const data = this.filteredSnapshots;
// Destroy existing instances
Object.keys(this._charts).forEach(k => {
if (this._charts[k]) {
try { this._charts[k].destroy(); } catch (_) {}
this._charts[k] = null;
}
});
if (data.length === 0) return;
this._charts.atmIv = new ApexCharts(
document.querySelector('#chart-atm-iv'),
buildAtmIvChart(data)
);
this._charts.atmIv.render();
this._charts.rr25 = new ApexCharts(
document.querySelector('#chart-rr25'),
buildRr25Chart(data)
);
this._charts.rr25.render();
this._charts.fly25 = new ApexCharts(
document.querySelector('#chart-fly25'),
buildFly25Chart(data)
);
this._charts.fly25.render();
},
// Re-render charts when expiry filter changes
// (triggered via @change on the select, which calls renderCharts() directly)
};
}
</script>
</body>
</html>