Flips and Buffer Zone example:
Here is an article written by ST : http://niftynirvana.blogspot.in/2012/09/price-flips.html
Flips and buffer zones are used in trade management and to gauge strength of the trend.
Flip = Normal trend
Buffer Zone = Strong Trend. As there is urgency among traders to get in. Keep holding on to the position.
After we enter, our entry price should act as a flip zone if our price reading is correct. If price pulls back deep, trend may be weaker than we think.