Signals can do more than notify you — pointed at a bot service like 3Commas, each entry and exit can drive a bot that places the actual orders. Here is the exact recipe.
Three parties, one clean split of jobs. CoinLAB says when and which way — a LONG entry, a close. The bot decides how much and places the order on your exchange, using its own settings. CoinLAB never touches your exchange account — the only thing that travels is a small JSON message.
That split answers the most common question up front: position size doesn't come from the signal. You set order size on the bot — that's where it belongs, next to your balance and risk settings — and the signal simply pulls the trigger.
Bot services accept webhooks in their own format only — our default JSON is made for your own scripts, and a bot will quietly ignore it. The trick is the custom message feature: whatever JSON you write is delivered as-is, so you paste the bot's own order form.
+ Add signal, pick your strategy, and select the WEBHOOK chip. Paste the bot's webhook URL as the address.CREATE.TradingView-style blanks in the pasted template — {{timenow}} and {{close}} — fill in automatically, so a template generated for TradingView works here unchanged.
DCA Bot: the JSON carries your bot_id and email_token and needs no edits. On multi-pair bots mind the pair field — 3Commas writes pairs quote-first (USDT_BTC on spot, USDT_BTCUSDT on futures). Since each CoinLAB signal line is one strategy on one coin, a fixed pair is exactly right.
Signal Bot: the generated JSON has an action field — set it to match your strategy's direction: enter_long / exit_long for a LONG strategy (in Entry and Close respectively), enter_short / exit_short for a SHORT one. If the bot is set to webhook-based sizing, the order block (amount, currency_type) is where size lives — a fixed value works fine.
Signal Bots also honor max_lag — they reject signals older than that many seconds. Keep it: it's your safety net against stale deliveries. DCA Bots have no such filter, so know that a delivery that failed and retried can arrive up to ~45 minutes late.
SEND TEST fires the bot for real. A custom message is delivered exactly as written, with no test marker — the bot can't tell our sample from a live signal and will open a real position. Wire your first test to a paper trading account (3Commas has one built in), watch a test entry and close arrive, then switch the bot to your live account.
Once live, every delivery is logged on the signal's page and under PAGE → Notifications — if the bot's service ever rejects a message, you'll see the failure and its reason there.
Connecting a bot means trades execute without you pressing anything — you own that configuration and its results. Signals are information; how a bot acts on them is between you and your bot. Nothing here is financial advice.