Build a prop risk tool

Watch equity on many accounts, enforce daily and maximum drawdown, and flatten on breach.

A prop risk tool has one job: never miss a breach. That means knowing when you can’t see an account, not just when it’s losing.

The shape

1. Connect each trader’s account, ideally with the investor password if you only monitor, or the master password if you must flatten.
2. Subscribe to each account’s stream for equity and positions.
3. Treat any health other than healthy as “not watching” and alert on it.
4. On breach, flatten with an idempotent close, then verify.

1. Stream equity

const ws = new WebSocket(`wss://api.tickwire.io/users/current/accounts/${id}/ws?auth-token=${token}`);
ws.onopen = () => ws.send(JSON.stringify({ type: "subscribe" }));
ws.onmessage = (m) => {
  const f = JSON.parse(m.data);
  if (f.type === "accountInformation" || f.type === "accountInformationUpdated") {
    check(id, f.accountInformation.equity, f.accountInformation.balance);
  }
  if (f.type === "health" && f.status !== "healthy") notWatching(id, f);
};

Keep the last seq you processed. If the socket drops, reconnect with {"type":"subscribe","sync":{"lastSeq":<seq>}} and you’ll get what you missed. See Streaming.

2. Day boundaries in broker time

Daily loss limits usually reset at the broker’s midnight. Take the start-of-day balance at the broker’s day change, not at UTC midnight. See Time zones.

3. Know when you’re blind

Register a webhook for account.health_changed. If an account goes disconnected or down, your tool isn’t protecting that trader. Say so in your UI rather than showing the last equity as current.

4. Flatten on breach

curl -s -X POST "$TW/users/current/accounts/$ID/trade" \
  -H "auth-token: $TW_KEY" \
  -H "Idempotency-Key: breach-$ID-2026-09-23" \
  -H "X-Actor: risk-engine" -H "X-Reason: daily loss 5% breached" \
  -H "content-type: application/json" \
  -d '{"actionType": "POSITIONS_CLOSE_SYMBOL", "symbol": "EURUSD"}'

Across many accounts at once, the batch endpoint POST /v1/orders/close takes selectors (all positions, by symbol, by magic) for up to 20 accounts in one idempotent call.

Then verify: read positions until it’s empty. If any close came back unknown, retry with the same key; see Idempotency.

5. Or let Tickwire enforce it

Our risk engine can run the rule for you: drawdown and profit trackers per day, week, month and lifetime, with absolute or relative thresholds and broker-time day boundaries. The guard runs next to the terminal, so it keeps enforcing even if our central services or yours are unreachable. Breaches arrive as webhooks. This part is not available yet.