The other primary way support and resistance levels are created in a market, is from swing points in a trend.
As a market trends, it retraces back on the trend and this retracement leaves a ‘swing point’ in the market, which in an uptrend looks like a peak and a downtrend looks like a trough.
In an uptrend, the old peaks will tend to act as support after price breaks up past them and then retraces back down to test them. In a downtrend, the opposite is true; the old troughs will tend to act as resistance after price breaks down through them and then retraces back up to test them.
Here’s an example of a market testing previous swing points (support) in a downtrend, note that as the market comes back to test the old support, the level then behaves as ‘new’ resistance and will very often hold price. It’s wise to look for an entry point into a trend as it comes back and tests these previous swing points (see pin bar sell signal in chart below), because it’s at these levels that the trend is most likely to resume, creating a low-risk / high-reward potential: