Gaps and Gap Analysis

There are 4 different gap analysis,

• Common Gaps

• Breakaway Gaps

• Runaway Gaps

• Exhaustion Gaps

Common Gaps :


Sometimes referred to as a trading gap or an area gap, the common gap is usually uneventful. In fact, they can be caused by a stock going ex-dividend when the trading volume is low. These gaps are common (get it?) and usually get filled fairly quickly. "Getting filled" means that the price action at a later time (few days to a few weeks) usually retraces at the least to the last day before the gap. This is also known as closing the gap. Here is a chart of two common gaps that have been filled. Notice that after the gap the prices have come down to at least the beginning of the gap? That is called closing or filling the gap.

Source : Stockcharts

Breakaway Gaps :


Breakaway gaps are the exciting ones. They occur when the price action is breaking out of their trading range or congestion area. To understand gaps, one has to understand the nature of congestion areas in the market. A congestion area is just a price range in which the market has traded for some period of time, usually a few weeks or so. The area near the top of the congestion area is usually resistance when approached from below. Likewise, the area near the bottom of the congestion area is support when approached from above. To break out of these areas requires market enthusiasm and, either, many more buyers than sellers for upside breakouts or more sellers than buyers for downside breakouts.

Volume will (should) pick up significantly, for not only the increased enthusiasm, but many are holding positions on the wrong side of the breakout and need to cover or sell them. It is better if the volume does not happen until the gap occurs. This means that the new change in market direction has a chance of continuing. The point of breakout now becomes the new support (if an upside breakout) or resistance (if a downside breakout). Don't fall into the trap of thinking this type of gap, if associated with good volume, will be filled soon. It might take a long time. Go with the fact that a new trend in the direction of the stock has taken place, and trade accordingly. Notice in the chart below how prices spent over 2 months without going lower than about 41. When they did, it was with increased volume and a downward breakaway gap.



A good confirmation for trading gaps is if they are associated with classic chart patterns. For example, if an ascending triangle suddenly has a breakout gap to the upside, this can be a much better trade than a breakaway gap without a good chart pattern associated with it. The chart below shows the normally bullish ascending triangle (flat top and rising, lower trend line) with a breakaway gap to the upside, as you would expect with an ascending triangle.