Market Structure — BOS, CHoCH, and Order Blocks

What Is Market Structure?

Market structure is the sequence of swing highs and swing lows that defines the current state of a trend. In a bull trend, price makes a series of higher highs (HH) and higher lows (HL). In a bear trend, it makes lower highs (LH) and lower lows (LL). Reading market structure correctly tells you whether the trend is intact, weakening, or reversing.

Break of Structure (BOS)

A Break of Structure occurs when price breaks beyond the most recent significant swing high (bullish BOS) or swing low (bearish BOS). A bullish BOS confirms that the uptrend is continuing — the new high extends the HH sequence. A bearish BOS confirms the downtrend is continuing.

BOS signals are continuation signals — they tell you the current trend has momentum and market participants are actively extending it.

Change of Character (CHoCH)

A Change of Character is the first signal of a potential trend reversal. It occurs when the established sequence of HH/HL (or LH/LL) is broken for the first time. In a bull trend, a CHoCH occurs when price makes a lower low — breaking below the most recent higher low.

CHoCH is not a reversal confirmation — it is a warning. It says "the structure that was supporting this trend has been broken." It requires confirmation from subsequent price action and supporting indicators before acting as a full reversal signal.

Order Blocks

An order block is the last opposing candle before a strong impulsive move. The concept: institutions execute large orders over time by breaking them into many smaller orders. The zone where they completed their accumulation (or distribution) is identifiable on the chart as the candle immediately preceding a sharp directional move.

Why do order blocks matter? Because institutions often return to their original entry zone to add to their position or defend it. When price retraces to an order block and holds, it confirms that the institutional order flow that caused the original move is still active.

Fair Value Gaps (FVG)

A Fair Value Gap is a price range where a candle moved so fast that it skipped past available orders, leaving an imbalance. Technically: an FVG exists when candle N+1 never overlaps candle N-1 — there is a gap in two-way price action. Markets have a strong tendency to return to these imbalances to "fill" them, as they represent zones where price discovery was incomplete.

Liquidity Sweeps

Retail traders predictably place stop losses just below obvious support levels and just above obvious resistance levels. Institutional traders are aware of this and occasionally push price into these stop clusters — triggering the stops and collecting the resulting order flow as institutional liquidity. After the sweep, price often reverses sharply. This is a liquidity sweep: a price move engineered to harvest retail stops before the real directional move.

TDL Connection

Institutional Edge Algo v8.5 automates the identification of all of these concepts simultaneously: BOS/CHoCH detection with structural labeling, order block mapping with volume confirmation and freshness tracking, FVG zones as visual reference areas, and liquidity sweep identification — all scored with a 0–100 Edge Score that quantifies the confluence quality of each setup.