How to execute my if loop only once in a streaming dataframe

I'm placing an order during live-streaming of stocks and getting data in a table/dataframe format like this , in which i get ohlc brick numbers and so on and on.....

            time_stamp     open     high      low    close  direction  brick_counts    volume    GREEN_BAR   RED_BAR  BLUE_BAR    time_id    
20 2021-11-19 21:41:43  66030.0  66030.0  66028.5  66028.5      down           -21  1116.333333      False    False      True         1
21 2021-11-19 21:41:43  66028.5  66028.5  66027.0  66027.0      down           -22  1116.333333      False    False      True         1
22 2021-11-19 21:41:43  66027.0  66027.0  66025.5  66025.5      down           -23  1116.333333      False    False      True         2
23 2021-11-19 21:41:43  66025.5  66025.5  66024.0  66024.0      down           -24  1116.333333      False    False      True         2
24 2021-11-19 21:41:43  66024.0  66024.0  66022.5  66022.5      down           -25  1116.333333      False    False      True         2
25 2021-11-19 21:41:43  66022.5  66022.5  66021.0  66021.0      down           -26  1116.333333      False    False      True         2

And using this if-loop code to place an order to my account.

if len(pos_df.columns) == 0 and len(ord_df.columns) == 0:
   for i in range(0,len(bricks_counts)):
       if bricks_counts[i] == -23 and red_neg == True:
           placeCoverOrder(ticker,"sell",quantity,high_down)
           print("sell order placed {}".format(ticker))
           break

Here i need that the if-loop should execute only once while live-streaming. I mean in the first iteration the if-loop sholud be true and in the second iteration the if-loop should be false.

Any help would be appreciated stack bros.