The most telling sign of a market top is when the major indexes move below a prior swing low. This is the ultimate confirmation of trouble. In an uptrend, prices make higher highs and higher lows. Therefore, when prices fail to make higher highs, or create a lower low than the previous low in the uptrend, the uptrend has failed. The daily or weekly chart is commonly used, but the time frame can be adjusted to reflect the individual investor’s time horizon. Unlike the first two indicators, this signal doesn't present itself until the top is established.
The Bottom Line
When euphoria is gripping the markets it can be hard to stand back from the frenzy and see that things may be heading for a reversal. This is why vigilant investors must dismiss emotions and remain focused on what the market is saying. A rising market will eventually correct and there are often early warning signs before the fall occurs. An investor who is aware of these signs can take profits in a rising market and then be on the sidelines for the correction, waiting patiently for prices to rise again.