Gap is break between two prices.Gap indicates strength.It is an area on price chart in which there were no trades.It indicates strength.It helps us to to locate the phase of a trend
Area Gaps appears inside the trading range.Volume during the gap day is generally low
Area gap may get filled in near term.
When price breakout from its trading range Breakout Gap forms.
.Volume should be high.
Runaway Gap appears after the breakout while moving forward due to getting some support global or otherwise.
When a day opens with a major gap but the gap got closed during the same day or next day it is called Exhaustion Gap.