SL not hitting properly. very serious Bug.

[kratos143]

I was backtesting a gap based strategy where target profit is hitting at the open of next day candle but sl is hitting at the predefined level which i placed in my code.
if self.signal1==1 :
sl1 = self.data.Close[-1] + slatr
tp1 = self.data.Close[-1] - tpatr
self.sell(sl=sl1, tp=tp1, size=self.mysize)
sl2 = self.data.Close[-1] - slatr
tp2 = self.data.Close[-1] + tpatr
self.buy(sl=sl2, tp=tp2, size=self.mysize)
lets say my sl is 50 points and target is 150 points , and next day market opens 150 points gap down , than sl hitting at midway 5 points where no price tick available. and tp is hitting at 150 points which is alright.