Legs: cheapest symbol that reaches the target hold, last stands, a reserve that grows with size

- A batch sizes its leg on every mapped candidate, each at the leverage
  the broker states for it, and trades the cheapest (spread, commissions,
  expected swap) that reaches the target hold — else the quickest. The
  dashboard ranks the same way from a half-hourly candidate survey.
- Last stand: when a daily-loss stop-out would leave the account within
  15% of that loss above its max-drawdown floor (the account type's static
  max loss, or the broker's liquidation floor), the leg carries no
  daily-loss stop and is sized against the firm's own breach.
- The daily-loss reserve is 10% of the limit or 0.1% of the position,
  whichever is more, since a stop's slippage grows with the position.
- The account type's max notional is gone: the broker's margin rates cap
  each symbol. planLegSize holds the one sizing rule fireLeg, the pick and
  the dashboard share.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -121,15 +121,21 @@ per-contract fees and the CME calendar.
 - **Target hold hours** — each leg's notional is sized from that volatility so
   its expected hold is about this long (blank = 12 h). The position never
   exceeds what the account's available funds can margin at the broker's
-  rate for the symbol (Tradeify: 5:1 crypto, 2:1 stocks), so a quiet market or
-  a big leg can hold longer than the target.
+  rate for the symbol (Tradeify: 5:1 crypto, 2:1 stocks — read from DXtrade,
+  nothing to set). A batch sizes its leg on every candidate and trades the
+  cheapest (spread, commissions, swap) that reaches the target hold; if the
+  leverage caps keep all of them short of it, the quickest.
 - **Financing %/day** if the firm charges swap (Tradeify 1-Step: `0.033`).
   Each take-profit then also carries the swap a winning leg is expected to pay
   before it fills, so a win still clears the full leg.
 
-Per account type: **Daily loss limit** (Tradeify: 3% of size — every leg then
-carries a stop that keeps the firm's day inside it, less a 10% reserve and
-fees) and **Max notional**, an optional ceiling on top of the broker's margin.
+Per account type, in the **Hard Daily Loss** column: the **daily loss limit**
+(Tradeify: 3% of size — every leg then carries a stop that keeps the firm's
+day inside it, less fees and a reserve of 10% of the limit or 0.1% of the
+position, whichever is more) and the **static max drawdown** (Tradeify
+1-Step: $6,000 on 100K). When a daily-loss stop-out would leave the account
+within 15% of that loss above its max-drawdown floor, the leg is a *last
+stand*: no daily-loss stop, running to its take-profit or the firm's breach.
 
 Before the scheduler trades a DXtrade firm, run the smoke test against a real
 login (with this instance's client for the firm disconnected):