If you've studied supply and demand trading before, order blocks will look very familiar. Both mark the area a strong move started from, expecting price to react when it returns. The differences are in how precisely the zone is drawn and what has to happen first.
Supply and demand zones
Supply and demand traders look for a base: a small cluster of candles where price paused before moving away sharply. The zone covers the whole base. A demand zone is a base before a rally; a supply zone is a base before a drop.
How order blocks differ
An order block narrows the zone to one candle: the last opposite candle before the move. SMC also adds conditions that classic supply and demand doesn't always require, such as a break of structure, a liquidity sweep before the move, and position in premium or discount.
| Supply / demand zone | Order block | |
|---|---|---|
| Zone | The whole base (several candles) | One candle (often its body) |
| Requires a BOS | Not always | Yes |
| Liquidity sweep | Not required | Preferred |
| Stop size | Larger | Smaller |
| Trade-off | Reached more often, wider risk | Tighter risk, missed more often |
Which should you use?
Many traders combine them: they mark the broader supply or demand zone on the higher timeframe, then refine it to an order block on a lower timeframe for the entry. That gives the context of the wider zone with the precision of the block.
Key takeaways
- Supply and demand zones cover the whole base a strong move started from.
- An order block narrows that zone to the last opposite candle before the move.
- Order blocks add SMC conditions such as a break of structure and a prior liquidity sweep.
- A common approach: mark the zone on the higher timeframe and refine it to an order block on a lower one.