Good morning anil'ji,when u think to buy above 20/50/200Sma bcoz lot of time scripts tend to play around this averages
I had some simple rules to follow...
Above 10 SMA - Very short term uptrend
Above 20 SMA - Short term Uptrend
Above 50 SMA - Intermediate uptrend
Above 200 SMA - Long term uptrend
If the MA i am following in trade breaches one in the respective timeframe, i am out of the trade...
Now for entry, as you know earlier i am too much focussed on consolidation led breakouts trades or retest type of trades with support from MA. But now i simply get into close above MA for longs too. And for stoploss in trail with ATR based. It can be 2-3ATR stoploss. for first few days then trailing using MA's in that timeframe.
Another thing is one should know whether there is expansion in ATR going on or not...After taking trade if ATR starts to expands in your direction of trade just try to stick in, dont get out too early...also dont try to enter into trade if ATR is too high...
Another thing is tracking overbought/oversold from higher timeframe charts it gives you some good early hints where are you into bigger picture...
For example: If stock is completely oversold in weekly timeframe and suppose it is hitting 52 week lows...track these stocks too, as they move out of consolidation base they are good runners for 50-100% moves...