Leading versus Lagging Indicators

There are two types of indicators:

1. leading.
2. lagging.
   

A leading indicator gives a buy signal before the new trend or reversal occurs.

A lagging indicator gives a signal after the trend has started and basically informs you “to pay attention”, the trend has started.

You would “catch” the entire trend every single time, IF the leading indicator was correct every single time. But it’s not.

When you use leading indicators, you will experience a lot of fake-outs. Leading indicators are notorious for giving bogus signals which will “mislead” you.

The other option is to use lagging indicators, which aren’t as prone to bogus signals. Lagging indicators only give signals after the price change is clearly forming a trend. The downside is that you’d be a little late in entering a position. Often the biggest gains of a trend occur in the first few bars, so by using a lagging indicator you could potentially miss out on much of the profit.

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Relative Strength Index (RSI)

Relative Strength Index, or RSI, is similar to stochastics in that it identifies overbought and oversold conditions in the market. It is also scaled from 0 to 100. Typically, readings below 20 indicate oversold, while readings over 80 indicate overbought.

Using RSI

RSI can be used just like stochastics. From the chart above you can see that when RSI dropped below 20, it correctly identified an oversold market. After the drop, the price quickly shot back up.

RSI is a very popular tool because it can also be used to confirm trend formations. If you think a trend is forming, take a quick look at the RSI and look at whether it is above or below 50. If you are looking at a possible uptrend, then make sure the RSI is above 50. If you are looking at a possible downtrend, then make sure the RSI is below 50.

In the beginning of the chart above, we can see that a possible uptrend was forming. To avoid fakeouts, we can wait for RSI to cross above 50 to confirm our trend. Sure enough, as RSI passes above 50, it is a good confirmation that an uptrend has actually formed.

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