Hi

I'm trying to enter a call options every day at 9:45am and close at the end of the day. For some reason, it can only find the options chain on specific days. I have set optionfilter to +1 and -1 from ATM strike, and looking for chain that expires between 0 and 15 days to expiry. I'm expecting to be able to find an options chain every day at every minute but it's not happening.

Could someone tell me what I've done wrong?

Thanks