No mcx data from invest bulls, only NSE data.
I think it is 1 min data. Not sure if it is tick data.
I am using Data Fetching Tool, Nest2Ami developed by TJ member Yusi for fetching Options Data.
IBC & Nest2Ami......both will be working in real time simultaneously.
Can't say abt delay from IBC.....as it hardly matters to my trading.
Cheers