DXtrade platform for Tradeify247: percent fees, hard daily-loss stops, volatility sizing, every-day lanes

- DXtrade client (lib/dxtrade-class.ts): REST session login with lockout-safe
  backoff, 60s sync of accounts/metrics/positions/orders/transfers, history and
  fund transactions from cash transactions, day-start balance at the 22:00 UTC
  reset, CLOSE-by-positionCode exits (native OCO group, else a stop-first
  emulated pair), a cross-account hedge guard, stray-order reaper.
- Instrument selector: the firm's symbol map lists candidate symbols per CME
  root; the cheapest tradable one per unit of recent hourly volatility wins
  (spread + 2x commission [+ financing] / sigma).
- Fees: a firm's commission % of notional prices every fee off the fill; the
  take-profit is solved in closed form so the leg nets its target.
- Hard daily loss limit per account type: every leg carries a stop keeping the
  firm's day inside the limit less a 10% reserve and both fees (rounded in);
  a green day never widens it; no room or a refused bracket flattens.
- Notional sizing where the platform prices positions: target-hold volatility
  sizing or the symbol map's fixed notional, under a per-type notional cap.
- Every-day firms trade weekends/holidays; the scheduler runs lanes (futures,
  one per DXtrade firm) with their own hours, flat gate, mutex and batches.
- The catalog sync skips platforms this build doesn't know instead of treating
  them as Tradovate. One shared fireLeg replaces the duplicated batch/copy code.
- npm run check: fee/stop/sizing/hours/selector checks; scripts/dxtrade-smoke.mjs
  confirms the API against a real login before trading.

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

README.md

@@ -1,7 +1,8 @@
 # AutoFirmer
 
-Automated futures trading dashboard for prop firm accounts via Tradovate and
-TopstepX (ProjectX Gateway).
+Automated trading dashboard for prop firm accounts via Tradovate and TopstepX
+(ProjectX Gateway) for CME futures, and DXtrade for 24/7 crypto/CFD firms
+(Tradeify247).
 
 ---
 
@@ -73,7 +74,7 @@ On first run, the SQLite database (`autotrader.sqlite`) is created automatically
 
 Firms and their account types live on the master dashboard, not here — every
 machine pulls the same catalog so they cannot drift apart. This machine only
-stores the Tradovate login for each firm.
+stores the platform login for each firm.
 
 1. On the **master dashboard**, open **Firms**, add the firm, and give it one
    account type per prefix + account size combination (profit target,
@@ -86,7 +87,10 @@ stores the Tradovate login for each firm.
    **TopstepX** on the master asks for an API key instead (generated in the
    TopstepX platform under Settings → API); the username is optional to store
    but the ProjectX login needs it before the firm can connect, so add it when
-   you have it. Password is unused on TopstepX
+   you have it. Password is unused on TopstepX. A **DXtrade** firm asks for
+   its DXtrade username and password (the ones behind the key icon on the
+   firm's dashboard, not the dashboard login); the server URL and login domain
+   come from the master
 4. Accounts populate once the firm connects. Each is matched to an account type
    by its name prefix *and* its size, so a new account shows as **Unassigned**
    until its opening funding transaction has been fetched. Use the **Account
@@ -94,6 +98,45 @@ stores the Tradovate login for each firm.
 
 ---
 
+## DXtrade firms (Tradeify247)
+
+A DXtrade firm is set up on the master's **Firms** page like any other, plus:
+
+- **Server URL** (`https://dx.tradeify247.co/dxsca-web`) and **login domain**
+  (usually `default`). Changing the URL re-keys the firm's accounts.
+- **Commission %** of notional per side (Tradeify: `0.04`). The engine prices
+  every fee off the fill with it.
+- **Trades every day** — weekends and CME holidays included. Such a firm runs
+  in its own scheduler *lane*: its own trading hours (closed only around the
+  daily roll), its own wait-until-flat gate and its own batches, so a
+  multi-hour crypto position never holds up the futures open.
+- **Symbol map** — which DXtrade symbols each CME root may trade as. A `*` row
+  covers every root (drain and extra-day legs trade `MNQ`, so map it or use
+  `*`). When a root lists several, the cheapest tradable one right now wins:
+  spread plus both commissions, divided by its recent hourly volatility.
+- **Target hold hours** — size each leg's notional so its expected hold is
+  about this long (0 = the symbol map's fixed notional per $1,000 of leg), and
+  **financing %/day** if the firm charges swap.
+
+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**.
+
+Before the scheduler trades a DXtrade firm, run the smoke test against a real
+login (with this instance's client for the firm disconnected):
+
+```bash
+DX_BASE=https://dx.tradeify247.co/dxsca-web DX_USER=… DX_PASS=… DX_SYMBOLS=BTC/USD,ETH/USD node scripts/dxtrade-smoke.mjs
+```
+
+It is read-only unless `DX_CONFIRM=yes DX_ACCOUNT=<code>` are set too, which
+adds one minimum-size live round trip.
+
+`npm run check` runs the pure-logic checks (fees, stops, sizing, trading
+hours, the instrument selector).
+
+---
+
 ## The master dashboard
 
 Set **Instance Name** and **Dashboard URL** on the Settings page and this