The OBV Divergence Indicator is a useful and popular free Forex indicator for MT4. It is designed to help traders identify potential reversals in the market by measuring the divergence between the OBV (On Balance Volume) and price. The indicator compares the current closing price to the previous closing price and calculates the OBV value. If the OBV value is higher than the price, it indicates a bullish divergence and vice versa. The indicator is a great tool for traders looking to take advantage of market reversals and capitalize on potential profits.