Crossover if previous value was equal and current value is high

[bhavesh0009]

I have data of Close and Previous Day High, and I wrote code like following

        if self.data.index[-1].time() >= pd.to_datetime(startScanTime).time() \
            and len(self.closed_trades) == 0 \
            and (not self.position):
            if crossover(self.data.Close, max(self.HighTillTF, self.prevDayHigh)):
                self.buy(sl=self.HighTillTF[-1] - (trailSL * self.HighTillTF[-1]), 
                        size=1)

Of course my first condition is true and when it searches for a crossover it is not generating any trade. It may be because the previous close was equal to PDH and the current close is greater than PDH. Is there anyway to generate trade in such a scenario as well?