Polymarket Trading Bot

A Rust trading bot for Polymarket that trades 15-minute (and 5-minute) price prediction markets using limit orders and trailing strategies.

Features:

• Dual Limit Same-Size (0.45) — Place Up/Down limit buys at $0.45 at market start; hedge with market buy if only one fills (2-min / 4-min / early / standard).
• Dual Limit 5-Minute BTC — Same idea for BTC 5-minute markets with time-based bands and trailing stop.
• Trailing Bot — Wait for price < 0.45, then trail with stop loss and trailing stop on the opposite side.
• Backtest — Replay strategy on historical price data in history/.
• Test binaries — Limit order, redeem, merge, allowance, sell, and prediction tests.

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Watch the bot in action:

After watching this video, I came up with a new strategy idea. I am now working on upgrading my trading bot to improve performance and maximize profitability.

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Quick reference

Binary	Description
main_dual_limit_045_same_size	Dual limit 0.45, same-size hedge (default)
main_dual_limit_045_5m_btc	Dual limit 0.45, BTC 5-minute only
main_trailing	Trailing stop bot
backtest	Backtest on history files
test_*	test_limit_order, test_redeem, test_merge, test_allowance, test_sell, test_predict_fun

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Setup

1. Install Rust (if needed):

   curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

2. Build:

   cargo build --release

   Release builds use LTO and single codegen-unit for better performance. TLS uses rustls (no system OpenSSL required).

3. Configure: Copy config.example.json to config.json and set:

   • polymarket: api_key, api_secret, api_passphrase, private_key
   • Optional: proxy_wallet_address, signature_type (1 = POLY_PROXY, 2 = GNOSIS_SAFE)
   • trading: enable flags, dual_limit_price, dual_limit_shares, hedge/trailing params, etc.

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Bot versions

1. Dual Limit Same-Size Bot (0.45) — default

Binary: main_dual_limit_045_same_size

At market start (first ~5 s), places limit buys for BTC and enabled ETH/SOL/XRP Up/Down at $0.45. If both fill → done for that market. If only one fills, applies a 2-min / 4-min / early / standard hedge: buy the unfilled side at market (same size), cancel the unfilled $0.45 limit.

Low-price exit (0.05 / 0.99 or 0.02 / 0.99): Two limit sells (cheap at $0.05 or $0.02, opposite at $0.99) are placed only when:

1. At least 10 minutes have elapsed.
2. The market was hedged via 4-min, early, or standard (not 2-min).
3. One side’s bid is below 0.10 (or below 0.03 for the 0.02/0.99 path when hedge price < 0.60).

# Simulation
cargo run --bin main_dual_limit_045_same_size -- --simulation

# Production (default binary)
cargo run -- --no-simulation

2. Dual Limit 5-Minute BTC Bot

Binary: main_dual_limit_045_5m_btc

Dual limit at $0.45 for BTC 5-minute markets only. Two windows: 2-min (2–3 min), 3-min (≥3 min), with bands and trailing stop (e.g. buy when ask ≥ lowest_ask + 0.03).

cargo run --bin main_dual_limit_045_5m_btc -- --config config.json --simulation
cargo run --bin main_dual_limit_045_5m_btc -- --config config.json --no-simulation

3. Trailing Bot

Binary: main_trailing

Waits until one token’s price is under 0.45, then trails that token (trailing stop with 0.45 cap). After the first buy, uses stop loss + trailing stop for the opposite token.

cargo run --bin main_trailing -- --simulation
cargo run --bin main_trailing -- --no-simulation

4. Backtest

Binary: backtest

Replays the dual-limit strategy on history/market_*_prices.toml: limit buys at $0.45, simulated fills, hedge logic, PnL. Requires existing price history files.

cargo run --bin backtest -- --backtest

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Test binaries

Binary	Purpose
test_limit_order	Place a limit order (e.g. --price-cents 60 --shares 10)
test_redeem	List/redeem winning tokens (--list, --redeem-all)
test_merge	Merge complete sets to USDC (--merge)
test_allowance	Check balance/allowance; set approval (--approve-only, --list)
test_sell	Test market sell
test_predict_fun	Test prediction/price logic

Example:

cargo run --bin test_allowance -- --approve-only   # One-time approval for selling
cargo run --bin test_redeem -- --list

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Configuration

• --simulation / --no-simulation — No real orders in simulation.
• --config <path> — Config file (default: config.json).

Config fields (summary):

• polymarket: gamma_api_url, clob_api_url, api_key, api_secret, api_passphrase, private_key, optional proxy_wallet_address, signature_type.
• trading: check_interval_ms, fixed_trade_amount, enable_btc_trading / enable_eth_trading / etc., dual_limit_price (0.45), dual_limit_shares, dual_limit_hedge_*, trailing_stop_point, trailing_shares, etc.

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Notes

• Bots run until you stop them (Ctrl+C).
• Simulation mode logs trades but does not send orders.
• Before selling, set on-chain approval once per proxy wallet:
  cargo run --bin test_allowance -- --approve-only

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Security

• Do not commit config.json with real keys or secrets.
• Prefer simulation and small sizes when testing.
• Monitor logs and balances when running in production.

Support

If you have any questions or would like a more customized app for specific use cases, please feel free to contact us at the contact information below.

• Discord: @solzen77