You describe the research. Jo writes the code.
Tell Jo the setup in plain English. The tearsheet here came from one sentence, run for real: 74 trades, worst month on the chart. Then the gauntlet:
Free: 300K AI tokens a week · 3 active projects · no card. First backtest tonight; the optimizer and paper desk are Pro.
"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 Python file you own. Never written code? You never have to open it. Every version saved, revert is free.
Next-bar-open fills, transaction costs included, intrabar stops. The trade log exports to CSV.
Grid search on a train/test split, scored by lower confidence bound. It ends in a call, and red means don't.
Real market bars, simulated money. Positions and P&L tick live, even 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) execute intrabar against the high and low, on the touch. A gap through your stop fills at the open, not at your price. No end-of-bar mercy.
Parameter search trains on one window and is judged on the next, scored 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.
Better to hear RED from a backtest than from the market. Put a hunch through it, free →
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.
Built in the open, dated, and honest about status.
One strategy, every name in the bucket. Sweep the whole Nifty 50 in a single run. Pro.
Native 1-second bars on CME futures via Databento, historic and live. Pro.
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. Pro is ₹3,250 a month at launch, half its list price.
Describe an idea, get the code, backtest it against real data.
The full loop: optimization verdicts, live paper trading, bucket sweeps.
Subscribe at launch and keep this price for as long as you stay subscribed.
What the product does and doesn't do, in plain terms.
Yes. You describe the strategy in plain English and Jo writes the Python. You can read and edit the file if you want to; you never have to.
Yes. NSE and BSE data come through Zerodha, intraday and daily. US and global markets come through Databento and Massive.
The Free plan costs nothing and needs no card: 300K AI tokens a week, 3 active projects, backtesting and research included. Pro is ₹3,250 a month at launch, half the ₹6,500 list price, and subscribers who join at launch keep that rate for as long as they stay subscribed. The optimizer, paper trading, bucket runs, and 1-second data are Pro.
Signals generated on one bar fill at the next bar's open, so a backtest can never trade on a close it hasn't seen. Stops and targets execute intrabar against the high and low, and a gap through your stop fills at the open.
No. QuantJo paper trades: live market data, simulated money. It does not connect to a brokerage and it cannot place a real order.
It's either an edge or it isn't. Under a minute to a project, your first backtest tonight.
Free plan: 300K AI tokens a week · 3 active projects · no card.