RBD in forex trading stands for Rally-Base-Drop. It is a price action formation commonly used to identify a potential supply zone, where selling pressure may be strong enough to push price lower. The pattern develops in three stages. First, price rallies upward, showing bullish movement. Next, it enters a short consolidation or “base” where buying and selling temporarily balance. Finally, price drops sharply from the base, indicating strong bearish momentum.

Traders pay close attention to the base because it can represent an area where significant sell orders were placed. When price later returns to this region, sellers may become active again, potentially causing another downward reaction. For this reason, an RBD formation is often marked as a supply zone on the chart.

The strength of an RBD zone depends on several factors, including the speed and size of the departure, the quality of the base, market structure, freshness of the zone, and the timeframe on which it appears. A sharp drop away from a relatively tight base generally attracts more attention than a slow or weak decline.

RBD zones can be combined with other technical concepts such as support and resistance, liquidity sweeps, market structure shifts, fair value gaps, and candlestick confirmation. However, no supply zone guarantees a reversal. Traders should consider overall market conditions, manage risk carefully, and use appropriate stop-loss placement.

Understanding RBD formations can help forex traders recognise areas where supply may outweigh demand and potentially plan more structured trade entries.