hi karthik,
if u see the charts for cipla and rcom u would find constriction on the bollinger bands. can u explain how to anticipate a breakout or breakdown in such a case. i havent been able to get it rght at all.
thanks
Biggles
Sorry , I missed this one.
Personally I am not a great fan of the Bollinger bands. Although many fancy the BBands a lot, I could not find it suitable for Trading. But to use as complimentary signal it was good.
Anyway I will share the bit of understanding I have on BBands. One of the most popular ideas for breakout detection from a BB squeeze is what is widely known as the TTM squeeze. This was developed by some the Tradestation group members ( as I understand).
The idea is to use a combination of Bollinger Bands and Keltner channels. I will not go into the details and construction of keltner channels which I presume that you are already aware.
If you plot the BBands and Keltner channels you will see that when the BBs get squeezed they fall within the Keltner channels. Once they expand the BBs will go out of the K channels. So if we check the ratio s of the BB and K channels we can find if the BBs are squeeze and also then they expand.
Additionally we can use momentum signal to indicate the direction to trade. When the BB expand and the momentum is positive go long and vice versa.
I am enclosing a simple chart showing such an indicator in Amibroker. It just a simple rehashed indicator form the net. The indicator shows the squeeze and expansion. If the indicator is above 1 and green in color then the BB is squeezed. When it crosses below 1 (red) the BBs are expanding. Check what is the momentum during that tome and trade accordingly.
A word of caution, IMHO just trading on BB expansion without any other indicator is not a very good idea.