Fable 5 Made Me a 5 Min Polymarket Trading Bot (full bot & results) High-frequency prediction markets look like easy money until you watch your P&L bleed in real time. I built a 5-minute strike sniper bot running live across four symbols—BTC, SOL, XRP, ETH—using lag arbitrage between Polymarket and external data feeds. The infrastructure works, the execution is brutal. Signals: 78% win rate on 9 trades (7 wins, 2 L's), daily P&L +$20.21, but two positions showing -5 each. One position down 73% with 16 seconds left, needed price under .72 in 9 seconds—missed by a heartbeat. ETH fill currently down 18%, another up 12%, hovering around 1828/1827 strike level. Position size: $5 per trade. Four simultaneous markets, 5-minute windows, taker orders for speed. Between the lines: the setup is solid—multi-account Polymarket integration, gamma API for market data, Hyperliquid for external pricing, automated share calculation based on size. But running four symbols at once in 5-minute markets is overkill. I leaned on Fable 5 to cook up the strategy from past GitHub patterns, which means potential overfitting to historical conditions that may not persist. No paper mode, live money on the line from day one. The more you trade, the less you have—frequency is the enemy here. Risk: sample size is laughably small. A 78% win rate means nothing after 9 trades. API latency, data sync delays, and competition in ultra-short windows can erase any edge instantly. Correlated losses across four assets would blow through capital faster than you can hit stop-loss. Daily stop loss is not optional here—it's mandatory. Flip: three consecutive L's, API latency spikes above 200ms, win rate dropping below 55% over 50 trades, increased order flow competition in 5-minute markets, correlated drawdown across multiple symbols, any change in Polymarket's fee structure or API limits. Trade: entry via lag arbitrage signals when strike price diverges from external data, $5 size until edge proven, 5-minute expiry window, invalidation if price does not cross threshold within 60 seconds of entry. Scale only after 50+ trades with consistent positive expectancy. Watch: API response times and data feed reliability, win rate normalization over larger sample, cross-asset correlation during volatility spikes, daily stop loss effectiveness, paper trading results before any size increase, market depth changes in 5-minute contracts. Bottom line: the infrastructure is ready, the edge is unproven. Start small, expect losses, and treat 5-minute markets as a laboratory, not a paycheck. #Polymarket #PredictionMarkets #HFT