Polymarket & Kalshi paper trading

Polymarket & Kalshi Paper Trading

Forward-test prediction-market strategies with virtual cash before risking real money. Your fills are priced from DepthFeed's live order books — buys at the ask, sells at the bid, positions settled automatically at market resolution — and every strategy gets its own equity curve, open-position view, and full trade log in the dashboard.

Start free, no card

DepthFeed Paper Trading is a forward-testing environment in the DepthFeed dashboard: strategies hold virtual cash and trade live Polymarket and Kalshi markets at real order-book prices. Signals arrive from your own system via a per-strategy webhook, or from a deployed Backtest Lab rule, and results are tracked as an equity curve with realized and unrealized P&L.

Read the API docs

Polymarket & Kalshi paper trading at a glance

Fills
Live book — buys at ask, sells at bid
Settlement
Automatic at resolution ($0 / $1)
Signal webhook
POST /paper/hook/{token} · 120/min
Strategies per plan
1 free · 5 Quant · 15 Research · 40 Desk
Starting balance
$100–$1,000,000 virtual (default $10,000)
Mark cadence
~90 seconds

Polymarket & Kalshi paper trading

How paper trading works

  1. Bring your own bot — signals over webhook

    Each strategy gets a secret webhook URL. Your system — a bot, a cron job, a notebook — POSTs buy/sell/close signals with a market id and a dollar size, and DepthFeed fills them at the live book at signal time. A payload can never set its own price, so the track record is honest by construction. Idempotency keys make retries safe, and the token rotates on demand.

  2. Or deploy a rule from the Backtest Lab

    The Backtest Lab backtests entry rules on resolved up/down markets — time-window entries, level crosses, dip reversion — with depth-aware VWAP fills against the recorded ladder. When a rule survives the backtest, deploy it to paper trading with a stake, take-profit/stop-loss, and a max-open cap; it then runs server-side against live quotes, no infrastructure on your end.

  3. A real track record, not a spreadsheet

    Positions are marked from the live book on a ~90-second cadence and settle to $0/$1 automatically when the market resolves — the same settlement data the API serves. The equity curve, realized vs unrealized P&L, and per-trade log give a strategy the forward evidence a backtest alone can't: how it behaves on markets that hadn't happened yet.

Inspect the data before integrating

Start with a bounded sample, verify the fields and timestamps, then choose the API or research workflow that matches the job.

Start free, no card · Read the API docs

Choose a venue or continue the workflowChoose a venue or continue the workflow

Questions, answered.

Start backtesting on real depth.

Start free