The WSO WRF MTF Indicator is a popular and free Forex indicator for the MT4 platform. The indicator provides a visual representation of the market trends and helps traders identify potential entry and exit points. It uses a combination of multiple time frames and trend lines to give a more accurate view of the market. The indicator is easy to use and provides a great way for traders to quickly identify profitable trading opportunities. With its free availability, the WSO WRF MTF Indicator is a popular choice for Forex traders.