How to Size a Trader Bot Closer to the Trader (Near 1:1)

Polycopy does not guarantee exact dollar-for-dollar mirroring on every fill. Slippage, drift chase, minimum order size, rounding, and your filters can change or skip copies. You can get close with the right settings.

You may run up to five active bots on the same trader, which exists so you can test two configurations side by side — but on a flat ticket there is very little for a second bot to prove, and each one draws on the same Polymarket cash. Note that stopping a bot also sells its open positions, so retiring a duplicate is not free.

Selective, Balanced, Broad and the Mirror route all place a flat $5 ticket per copy — the size never scales to the trader's. Mirror copies the broadest set of their trades, but still at your ticket size; its name describes which trades it takes, not how big they are. To size closer to the trader you have to take the Custom route.

If the trader often bets similar amounts (e.g. $30–80), take the Custom route, choose Fixed allocation, and set the trade amount to their typical bet. Set total capital to at least 10–20× that amount, and max per trade at or above it so nothing clips lower.

If their size swings a lot, Conviction scales 0.5x–3x with how large their bet is vs their average (not an exact USD match). Set max per trade at or above their largest expected bet, and enough total capital. Avoid Kelly if you want predictable size — it sizes from edge and bankroll, not the trader's notional.

Custom starts with no cap on open trades — the bot can hold your whole budget in open positions at once, and its 30% drawdown stop is the only limit left. The review screen warns you about this in amber; set an open-exposure cap under Edit settings if you want one. Keep Mirror Sells on if you want your exits to follow the trader's.