Order Blocks and Fair Value Gaps: The Core SMC Mechanic

If liquidity tells you where price is going, then Order Blocks and Fair Value Gaps tell you where it is most likely to react when it gets there. Together they form the core entry mechanic of every SMC playbook.

Part of: the Smart Money Concepts pillar. For the complete framework, start there.

What Is an Order Block

An Order Block (OB) is the last opposite-direction candle before a strong impulsive move that breaks structure. It marks the price zone where institutions filled their positions before driving the market. A bullish OB is the last bearish candle before an upward BOS. A bearish OB is the last bullish candle before a downward BOS.

Not every Order Block is tradable. A high probability OB must satisfy three conditions:

  • It swept liquidity (equal highs/lows or a prior swing) immediately before the impulse.
  • The impulsive move out of it created a Fair Value Gap.
  • The impulse caused a clean Break of Structure on the working timeframe.

What Is a Fair Value Gap

A Fair Value Gap (FVG) is a three-candle pattern where the wick of candle 1 and the wick of candle 3 do not overlap, leaving a price range that was never traded efficiently. FVGs are inefficiencies, and price has a strong tendency to return and rebalance them.

FVGs are valuable for two reasons. First, they confirm displacement: if an impulse left an FVG, real institutional intent was behind it. Second, the FVG itself becomes a magnet, often offering a precise re-entry zone on the way back into the Order Block.

The A+ Setup: Order Block Plus FVG

The cleanest SMC entries occur where an FVG sits inside or adjacent to an Order Block. Price returns, taps the FVG (often the OB high or low), and reacts. You enter at the edge of the zone with a stop just beyond the OB and a target at the next opposing liquidity pool.

Pro Tip: If the OB has no FVG attached to it, the displacement was weak and the zone is statistically less likely to hold. Skip it. Demanding both reduces your trade count, but raises your average win rate dramatically.

Stacking POI Confluence

Top-tier setups stack additional confluence on top of the OB and FVG: a sweep of an obvious liquidity pool, a CHoCH on the lower timeframe, and entry timing during a London or New York killzone. This is the institutional grade filter that separates the few signals worth trading from the many that look like setups but are not.

Wrap-Up

Order Blocks and FVGs are not "patterns" in the retail sense. They are the visible footprint of where institutional orders were filled and where price will return to rebalance. Mastered together, they become the core entry engine of any serious SMC system.