prasadam,
Syat you got that statement in wrong context
... i don't want to disrespect the importance of knowing what it means ... Actually I want to
pay respect to you about having that knowledge ... I am comparing you with no-one but God ... you saw that?! ...
... Look, I am such an illiterate person here ... How can I know what each & everything means?
... anyway look what I have found
Developed by John Bollinger, Bollinger Bands are an indicator that allows users to compare volatility and relative price levels over a period of time. The indicator consists of three bands designed to encompass the majority of a security's price action.
1.
A simple moving average in the middle
2.
An upper band (SMA plus 2 standard deviations)
3.
A lower band (SMA minus 2 standard deviations)
Standard deviation is a statistical unit of measure that provides a good assessment of a price plot's volatility. Using the standard deviation ensures that the bands will react quickly to price movements and reflect periods of high and low volatility. Sharp price increases (or decreases), and hence volatility, will lead to a widening of the bands.
..... So 20 ==> SMA 20 ===> mean line of BB
..... and 2 ==> standard deviation ==> I don't understand this
... come on prasadam, Cheerup!
...please, don't get upset over my foolish statements ...I know I am an
absolute fool, I don't know what to speak and how to speak & when to speak ... I won't reach your level of understanding in my whole life ... this is not syat ,... this is fact....thats why you are like a God for me ...