Supply and demand zones are one of the oldest ideas in price action trading, and Smart Money Concepts adopted and refined them. A demand zone is where buyers previously stepped in with enough force to push price sharply higher. A supply zone is the mirror image on the sell side.
How a Zone Forms
Zones typically form in one of two patterns: a sharp reversal (rally-base-drop or drop-base-rally) or a breakout from consolidation (drop-base-drop or rally-base-rally). The base — a period of tight consolidation — is the actual zone you mark on your chart.
Supply and Demand Zones vs. Order Blocks
The two concepts overlap heavily but are not identical. An order block is defined strictly by the last opposite candle before a displacement. A supply or demand zone can span a wider consolidation range covering several candles. In practice, many traders use the terms almost interchangeably, but zones tend to be broader and less precise than order blocks.
Fresh vs. Tested Zones
- ▸Fresh zone: price has not returned to it since formation — untouched orders are more likely to still be resting there.
- ▸Tested zone: price has already returned once and reacted — the zone is weaker but not necessarily invalid.
- ▸Broken zone: price has closed through the zone with strength — the zone is invalidated and may flip polarity.
When a demand zone is broken decisively, it can flip into a supply zone on a later retest — the same price area, but with the roles of buyers and sellers reversed.
Grading Zone Quality
- 1.Look for a sharp, impulsive departure from the zone — the stronger the move, the more significant the zone.
- 2.Prefer zones that align with the higher-timeframe trend.
- 3.Prefer fresh, untested zones over ones that have already been retested multiple times.
- 4.Check for confluence with liquidity pools or fair value gaps inside the zone.
Every time price returns to a zone and reacts, some of the resting orders get filled. A zone that has been tested three or four times is far less reliable than a fresh one.
Building a Simple Zone Trade
Mark the zone, wait for price to return into it, and look for a lower-timeframe reaction such as a rejection wick or a small structural shift before entering. Place the stop just beyond the far edge of the zone, and target the next opposing zone or liquidity level.