[ACR+]EXPANSION DETECTION

[ACR+] Expansion Detection is a price-action tool that spots true momentum expansions, distinguishes high-quality displacements (CISD), and flags wick-driven reversals—all in the context of internal market structure. It keeps your chart clean: only the trade-relevant signals are plotted; structure lines/labels are computed under the hood.

Signals on the chart

Expansion (non-CISD)

Bullish: ▲ triangle below bar (green)

Bearish: ▼ triangle above bar (red)

CISD (Change In State of Delivery) — expansion with displacement & quality filters

Bullish: ◆ diamond below bar (lime)

Bearish: ◆ diamond above bar (orange)

Reversal (wick-dominant + optional engulf)

Bullish: ● circle below bar (teal)

Bearish: ● circle above bar (purple)

The script automatically prefers CISD: if a bar qualifies as CISD, only the CISD mark is shown (not the plain Expansion).

How it works (under the hood)

Body vs Wick engine

Expansion when body dominates wick (Body/Wick > kBW) and body exceeds its average (Body > kBodyAvg × SMA(Body)).

Reversal when one wick is decisively larger than the body (pin-bar style) with optional engulf confirmation.

Structure context (internal)

Builds short/intermediate/long-term swings internally and checks BOS (Break of Structure) and liquidity sweeps around the latest IT levels for higher signal quality.

CISD filter

Expansion + displacement vs ATR (min body vs ATR)

Optional FVG (3-bar gap) confirmation

Optional BOS confirmation in the same direction

Optional previous Inside Bar requirement