My script isn't working. Any ideas?
def afterclose = Gettime() > RegularTradingEnd (20200508);
def beforeStart = GetTime() < RegularTradingStart(20200509);
def vol = if afterclose and beforeStart then vol[1] + volume else Double.NaN;
plot PreMarketVolume = vol;
def afterclose = Gettime() > RegularTradingEnd (20200508);
def beforeStart = GetTime() < RegularTradingStart(20200509);
def vol = if afterclose and beforeStart then vol[1] + volume else Double.NaN;
plot PreMarketVolume = vol;