This indicator is supposed to help traders identify potential market reversal points. Please note this is not a buy/sell indicator!
Peak Reversal is an indicator, which can be used as an early identification for a reversal, or a reversion to the mean. In mean reversion we try to find the bar where we can be certain a reversal is in play, as opposed to the proverbial knife catch. Peak Reversal helps by identifying the bar that actually reversed trend. As you can see it is often accurate, but as you can tell, one has to be careful applying this indicator to their trading, as the trend can just continue onwards.
Additionally Peak Reversal uses the same Keltner channels it uses to identify reversals also as breakouts. By default the breakout indication is off, because the chart gets messy otherwise. You can turn it on manually in the settings. When these triangles appear, you can interpret the bars as potentially starting a strong trend. What you don't want to see is a rejection X followed by a breakout triangle obviously.
Note that by default the coloring is very subdued. That's just a personal preference. You can adjust to yours in the settings.