Im making the same trade @15x as I was @10x. Basically $1000 @ 10x and $1000 @ 15x. And I am setting the TP @ 5%. I am getting $5 or so profit when the 10x trade triggers the TP and only $3 or so when the 15x triggers. It seems backwards to me as well. I would think if I used 15x margin the profit would increase or at least be the same when I set the TP @ 5%. There must be some equation or online calculator or someone that knows why this would be?
First of all ned to understand in the margin trade the profit is not only based on the leverage you've used, there must be the funding rate fees and other hidden fee charges so calculating the profit is not gonna be efficient as the fees may vary from the platform to platform but in your case.
On the same to check your profit just check your position size, fees, and funding rate, in dile situation the TP of 5% on 15X leverage is gonna give 5 times more profit because the positon size is according to 15x but when it comes to small trades it won't put a significant change between the 10x and 15x due to funding rates and the other fees deduction.
In simple more position size = more profit on 5% TP, because the TP is set based on the total trade position size, A friendly reminder I don't trade in leverage due to some of the reasons and I strongly discourage leverage trading due to religious and ethical point of view, people just lose money leverage because they gamble on trade while using leverage.