For traders who can read Python
Tell Jo the setup in plain English. Then the gauntlet:
Free plan: 200K AI tokens · 30 backtest minutes · no card.
"Go long the NIFTY 50 when the 20-hour SMA crosses above the 50. Flip short when it crosses back down."
Idea to live paper trade without leaving the project. No notebook, no spreadsheet, no copy-pasting between five tools.
Plain English. Entry, exit, universe. Jo asks when something is ambiguous.
A real strategy file you can read, edit, and keep. Every version saved, revert is free.
Next-bar-open fills, costs in bps, intrabar stops. The trade log exports to CSV.
3-phase grid search: train, test, validate. It ends in a call, and red means don't.
Real market bars, simulated money. Positions, P&L, and alerts while you sleep.
Most backtesting flatters the strategy. Ours is built to disappoint you early, before the market does it with your money.
A signal on bar N fills at bar N+1's open. Your backtest can't peek at the close it trades on, so live paper results track the simulation.
Platform exit rules (stop loss, take profit, trailing stop) execute intrabar against the high and low, on the touch. No end-of-bar mercy.
Parameter search runs train / test / validate splits and scores by lower confidence bound. Overfit ideas come back RED, with the reason.
Run Python cells against your data in a sandbox: rank the Nifty 50 by a signal, chart pair spreads with Plotly, keep every analysis on the research rail.
Authenticate with a provider one time. Jo probes what it can do (historical, live feed) and uses it everywhere: backtests, research, paper trading.
| Provider | Markets | Bars | Auth |
|---|---|---|---|
| ZerodhaIndia | NSE & BSE equities, futures, options | Daily + intraday, 1m to 240m | OAuth |
| DatabentoGlobal | CME, NYSE, NASDAQ, crypto | Tick data, any interval reconstructed | API key |
| MassiveUS | US equities & ETFs, fundamentals | Daily, hourly, intraday | API key |
Every trading tool oversells. Here is our own risk disclosure, kept current.
The plan is simple: every strategy you validate here should eventually trade real capital here. In the open, dated, and honest about status.
Real orders from your paper-validated strategies. In closed beta while SEBI clearance completes.
NSE and CME options data is already connected. Strategy support lands in the SDK next.
Screen on earnings and balance-sheet data alongside price. More exchanges beyond NSE, BSE, and US venues.
Publish a validated strategy with its full tearsheet. Fork someone else's and test it on your own data.
Start free. Upgrade when you outgrow it.
Build and backtest any strategy you can describe.
Run a real research workflow.
Under a minute to your first project. Your first backtest tonight.
Free plan: 200K AI tokens · 30 backtest minutes · every feature above.