Hi OP, I think there's a problem with the simulating tool especially when the total balance of the portfolio hits around $8K and above. Right from there the PnL doesn't seem to change. The value is fixed at
+2050 USD for profit and
-1850 USD loss no matter how high the margin goes. I think this affects the final results of the projection.

Take note how consistent the values seem to be, i thought we would see at least PnLs like -1711 USD, + 2186 USD etc for different margins used in each trade
Please check and see if there;s a problem with the tool's computation.