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I am not sure why you suggested "equity margin calculator". It doesn't show either of these stocks.
Regarding a flag, there is a slight problem with it. If I remember correctly, the list keeps changing. So I have to update the flag everyday for 5000 stocks. It's far from ideal. Maybe I will hit the day limit for the order API too.
I guess there is nothing I can do at this moment then.
This is what I am interested in (for all the stocks). I want to classify stocks by intraday, BTST only, and delivery-to-delivery.