KK,
Suggest you to have a look at Sharekhan's TradeTiger platform. For a nominal charge you can open an account and get an excellent charting tool, with alerts for price triggers etc. Besides you can have more than 4 charts on the screen simultaneously. Also, it can show charts at 1/2/5/10/15/30/60 minute intervals, besides you can have daily/weekly charts as well - all these on the same screen.... For brokerage purpose, you can have an account elsewhere, but do suggest have a look at TT. Good luck.