A chart containing EOD of BB with (9,2) and (20,2) is attached.
As discussed earlier ,BB-9 will show up earlier , reversals can be
seen sharper (in case of BB-20 they are smooth ,a bit lagging)
but ultimately the decision of EXIT depends on BB-20.
In the both cases after hitting BOTTOM band ,the price rose to hit
middle band only.From there it slipped again.But rewarded those who
held position ,till price hit the TOP band.
If one earns more than 7 points ( 7*50=350Rs points*lotsize) that is
sufficient (mathmatically) since one does not pay more than 300/-
for a total transaction (BUY+SELL) including all taxes.Correct me if I am
wrong.