Decision API

Ask a market question. Get a number back.

A typed API that answers questions about any symbol — not a chat box, not a chart. You write the rule, it returns a probability, a pick, a score or a figure, with the working attached.

Your first 25 calls are on us. After that, about $0.002 each.

  • One request, one answer

    POST a small JSON object and get a typed answer back. {"symbol":"NVDA","decision_type":"rsi_check"} is a complete call.

  • A belief, not a verdict

    Answers come back 0 to 1. 0.93 is a strong yes, 0.5 means the numbers do not tell you — which a true/false can never say.

  • The backtester's own language

    rsi > 70, adx(14) > 25, C > highest(C,20) + 0.5 * atr(14). The same grammar as an entry condition in Backtest Quick, not a second dialect.

  • Five answer shapes

    Yes/no, a choice with odds on every option, a score between rungs, a ranking with strengths, or a plain number out of the state.

  • Daily or intraday

    Daily bars from our own database, or 1m to 1h built live. Mix timeframes in one rule — C@1d reads the last closed daily bar.

  • Or just ask in English

    Swap the rule for "instructions" and a model answers in the same shape, against the same state. Rules stay free and instant.

  • 142 worked examples

    Every one runnable from the page, graded from a one-line preset to a full desk screen. Press Run on any of them.

  • Priced per call, not per seat

    $1.00 per million processed tokens — about $0.002 a call. No subscription, no minimum, no invoice.

Write your first rule in about a minute.