
Your Bot Didn't Get That Price
A bot's backtest shows one price. Live execution shows another. Here's what sits between them, why liquidity and order size decide the gap, and how to stop it from quietly eating a strategy's edge.

A bot's backtest shows one price. Live execution shows another. Here's what sits between them, why liquidity and order size decide the gap, and how to stop it from quietly eating a strategy's edge.

Every perp screen shows three prices, and only one of them closes your position. How mark, index and last price are calculated on Binance, Bybit, Aster, EVEDEX and Hyperliquid, why a wick on the chart may not liquidate you, and how to check the gap before launching a futures bot.

Bitcoin is down 28% on the year and the Fear index reads 27. One trader ran four bots through it: three COMBO Shorts at 10x and one unleveraged spot DCA, +$8,678 on $7,581 committed. Here's the setup, bot by bot, and where it would have failed.

EVEDEX ships its own AI bots, which most perp DEXs don't. They run one strategy family on four pairs. Everything outside that — grid, DCA, several venues at once — arrives through a trade-only API key or your own code. Here is the full 2026 landscape.

Aster's headline commission is 0% maker and 0.04% taker on USDT perpetuals, and for most traders it is the smallest number on the bill. Execution mode and funding both cost more. Here is the full price list, from Aster's own documentation, with the arithmetic worked through.

Aster's own Pro Mode already has native grid trading — what it lacks is DCA, COMBO-style strategies, and multi-venue management. Here's exactly which platforms fill that gap in 2026, verified rather than assumed.

EVEDEX is a non-custodial, no-KYC futures exchange, and COMBO is already its dominant bot type — 99.5% of DEX-connected COMBO bots on Bitsgap ran there in H1 2026. Here's the full setup walkthrough: connect, configure, backtest, launch.

A COMBO bot doesn't change between long and short — direction is a configuration choice, not a different strategy. This guide breaks down what actually flips, compares long vs. short setups side by side, and walks through reading market structure before you launch.
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