Today ICICI bank and Siemens are strong shares of type (b) above according to above post and NTPC and NALCO are weak stocks type (c).
P.S see above post for types (b) or (c) .
will post chart after market hours for explanation
After identification of stocks in first hour , trading becomes easy in rest of hours .
Today I selected 4 stocks for trading and after that only 6 charts i.e.4 above stocks, Nifty chart and Tata Power (Tata power is my darling or lucky stock) were open on my terminal , did not even saw what's happening in other stocks .
Now coming on How to do scalping , Just put any buy / sell signal criteria either mentally or explicitly in ur software and wait for buy signal in strong stocks and sell signal in weak stocks.
What should be buy / sell signal : That depends on trader to trader,
in below chart will try to implement one of the most basic and simple signal of Moving average crossover signal , Even that will also work well at least for scalping .
below chart is of NTPC with Moving average crossover
Since this Stock was identified as weak so will trade only on sell signal i.e that is bearish crossover (will trade for minimum 1 % gain and max 2 % gain in one trade)
Below chart is of Nalco , another weak stock reported in morning Post