how to draw supply and demand zones

Traders,

If anybody want to learn supply and demand zone trading and want to know how to identify supply and demand zones can learn from below link.
It is easy to identify and trade them.this is also called bouncing zone strategy.

Part-1

http://www.21pips.com/forex-bouncing-zones-1.php

Part-2

http://www.21pips.com/forex-bouncing-zones-2.php

Regards

mmohanar