Hi Alex,
I think there is an issue in how the API handles a orderStrategy with a breakeven and breakevenPlus, when shorting.
When providing the breakeven points, you need a positive value, but for the breakevenPlus, you need to set a negative value otherwise your stop gets adjusted to entryPrice + breakevenPlus, which could be even further from your entry than your initial stoploss.
In my opinion it does not make sense that you have to provide a non absolute number for the breakevenPlus, especially since on the website when using the interface, you will always use a positive value for breakeven plus.