- Legs table now sits below the P/L chart and stats
- Each leg row has a leftmost "Show" checkbox; unchecked legs are excluded
from the chart, stats, breakevens and net Greeks (and dimmed in the table),
so you can isolate or build up a strategy incrementally
- All derived values (chart, netCost, maxDTE/minDTE, strategy name, stats)
now operate on the active (checked) legs only
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Evaluate the expiration P/L at the exact strike prices (and sample bounds),
not just on the coarse grid — so max profit / max loss are exact for
piecewise payoffs (butterfly peak now $800 not ~$679) and the chart renders
sharp vertices for butterflies, condors, etc.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Use exact (not floored) days-to-earliest-expiry so the "Expiration P/L"
curve uses true intrinsic value — long call/put now show a flat loss floor
at -premium, a sharp kink at the strike, and the correct breakeven, instead
of a soft-cornered curve with ~1 day of residual time value
- Clamp the y-axis when one tail is unbounded so the loss floor stays visible
instead of being squished to a sliver by the runaway profit/loss tail
- Slightly tighter default x-window; denser sampling (161 pts)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- New strategy.html: thinkorswim-style P/L diagram (expiration + T+N curves
via Black-Scholes, days-to-expiry slider, net debit/credit, max profit/loss
with unbounded detection, breakevens, net Greeks, auto-detected strategy name)
- chain.html: per-row Buy/Sell buttons add legs to a localStorage basket;
basket badge in toolbar; auto-scroll to ATM row on load
- Persist per-page view state (symbol, expiry, loaded data, charts) across
navigation via viewstate-store.js for chain/surface/tracker/dashboard
- New assets: blackscholes.js (frontend BS port), strategy-store.js, viewstate-store.js
- Strategy P/L nav link added to all sidebars
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
