Hi Preston,
So ... it appears to me that you have finished with the NSE Data Downloader and you yourself have been satisfied with it, ..... which has made you look around for developing a program for the derivatives.
Good work and keep it up. However, personally I have NOT tried your software. The postings from MSRM and your replies to the same were very informative in that thread.
The 5 mts delay for the RT input for the F&O is NOT a big deal, especially for carrying out the RT analysis for taking appropriate and suitable RT actions using one's broker's software.
Good Luck. I am sure that you would be successful.
Cheers!
SS