I would like to be able to save the maximum values for the stocks in my universe at a given time after open, then, trade off of those levels but I can't seem to find a solution. Any suggestions are appreciated. 

 

 for x in self.symbols:
           self.AddSecurity(x)
           
       
       self.maxPrices45 = {}
       for x in self.symbols:
               self.maxPrices45[x] = self.MAX(x, 45)
           
          
       
       self.minPrices45 = {}
       for x in self.symbols:
               self.minPrices45[x] = self.MIN(x, 45)
           

       

       self.maxPrices45final = {}
       for x in self.maxPrices45:
           self.Schedule.On(self.DateRules.EveryDay(x), self.TimeRules.AfterMarketOpen(x, 45), self.maxPrices45.Current.Value = self.maxPrices45final)
           
       
       self.minPrices45final = {}
       for x in self.minPrices45:
           self.Schedule.On(self.DateRules.EveryDay(x), self.TimeRules.AfterMarketOpen(x, 45), self.minPrices45.Current.Value = self.minPrices45final)