The Peak HiLo indicator is a MetaTrader 4 (MT4) indicator that automatically plots the Highs and Lows on the trading chart. The high and low refers to the high or low that price has reached over a certain time frame. Having the high and low marked would then make it clear when the price is approaching and looking to break the high or low levels. These highs and lows often act as support and resistance levels. This indicator works with all currency pairs and all timeframes. Once you download and install the indicator, it will appear in your trading chart, like the image shown above.