project a pricelevel based on profits

i have a cBot that manages positions, so i already do know the drawdown and profit values in realtime,

but how can i project this to a price level in order to draw a line.

the idea is to have a "stop-line" based on the pre-set drawdown level.

as multiple positions can have multiple sizes on the same asset, this may be hard to calculate.

is there a way to do that via the API ?