On JStock Free.
Sir,
There is another software for technical analysis which is just simple and free - though not advanced (and complicated as well) as Amibroker or Fibotrader and any such ones. I fee JStock has all the basic requirements including basic scanning. It works with both NSE and BSE. It has Alert function also, and more than that you find live updates. Further, it synchronizes with Android version (for sync you need to purchase the mobile version). The desktop version is completely free. After all, it is the man behind the scalpel who is important.
You may use JStock on Linux also.