Guess you haven't yet checked out Pi. http://zerodha.com/z-connect/category/tradezerodha/pi-tradezerodha
I can get data from ZT as well as NSE NOW using Josh sir utility to amibroker. what about Pi? how to get data from PI to amibroker and one more the feed back which i have read about Pi in this forum is not great, because still it is not stable, i think it is in the process.