Trading Software for Old pentium 3 computer

#1
Hey, currently i am using Anandrathi's Nest trader pro for nse intraday. It is slowing down my system. My system specs - p3 800, 450mb ram. It allows only 1 min candlestick chart for intraday. I can't configure 3min or 5min candle stick charts. Their recent update does not allow to add any indicator.(earlier 30 odd indicators were available). Brokerage is .5% and .05% for delivery and intraday. It allows only daily charts, i cant see 2,3 or 4 day charts to know previous support and resistance(sometimes this setup will be useful, check google finance).

Basically, i am looking for a fast software(less resource hungry) which also provides the above features.