Supply & demand: mapping key reaction areasEUR/USDOANDA:EURUSDElite-Gold-SMCSupply and demand zones are fundamental concepts in technical analysis, helping traders identify areas where strong buying or selling pressure has previously influenced price. A supply zone represents an area where sellers have historically entered the market with enough strength to push price lower. When price revisits this area, traders monitor the reaction for potential signs of rejection or renewed selling pressure. A demand zone represents an area where buyers have previously demonstrated strong interest, resulting in an upward price movement. When price returns to this zone, traders look for evidence that buyers are still defending the area. However, these zones should not be treated as automatic entry points. Their reliability increases when combined with market structure, liquidity, momentum, and price-action confirmation. key factors to consider • Strong displacement — Look for a decisive move away from the zone. • Freshness — Untested zones may carry greater significance. • Market structure — Consider the broader trend before anticipating a reaction. • Liquidity — Previous highs and lows can provide important context. • Price reaction — Wait for rejection or structural confirmation before entering. • Risk management — Always define invalidation and risk before taking a position. The objective is not to predict every reversal. Instead, supply and demand zones should be used as high-interest areas where traders observe price behavior and wait for confirmation. A professional approach combines market structure + liquidity + supply & demand + confirmation + disciplined risk management.