I do scapling in Nifty Options and I would like to share a few points as under :
1) I need approx 3 points in Nifty options to take cate of exchange charges,low brokerage and STT and also a few wrong trades which always happen irrespective of what we do. So if I am scalping At The Money options ,it means the nifty should give me a move of 6-7 points in direction of my trade that too very quickly.
2) I select my place for scalping .....such as when a hourly bar's bottom gets broken, or a important pivot gets taken out,break of a trend line,failure of breakouts/breakdowns....these are places where the counter gets into high activity mode,the moves are strong and fast. I can achive my targert move in less than a minuts in the trade. Sometimes I got even 6-8 points in such scalps agaist 3 to 3.5 points which I am looking for.....Though this is not scalping strictly....it is actually trading breakouts for small price move.....but whatever it is called ,these quick scalps suit my mental set up.
3) Sometimes bid/ask spread gets wide....in this case try to buy at lower side of the spread and sell at higher side.....this is to be tried in stable markets...not in trend moves because mkts are likely to jump in trend moves....
I am not a regular scalper...but thought of sharing few points here...
Smart_trade