r/TopStepX•
L4g4d0

Way to Auto-Adjust Lot Size per SL

Trading Combine

Hey everyone,

I've been testing out TopStep for the past few days, and the one thing I really miss is a way to automatically set the contract size based on the stop loss I want to use.

For example, let’s say I want to fix my stop loss at 100 pips. With 1 contract on MNQ, that’s around $200 risked. But if I only need a 50-pip stop, I could double the contract size to 2, still keeping the $200 risk.

I trade NQ, but also MES, MBT, and MGCC, and it becomes a real hassle to manually calculate the correct contract size for each instrument based on the stop loss.

Is there an easier way to do this? I tried using the LONG/SHORT position tools, but they don’t seem to work the way I expected.

Thanks!

Posted Aug 5, 2025, 9:14 PM UTC

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