Compression Geometry: Ascending Triangles, Wedges & VCP Breakouts

Why progressively shallower pullbacks into a flat resistance lid signal institutional absorption prior to breakout. Within the Technical Analysis curriculum (Chart Patterns & Geometry → Classical & Harmonic), this topic establishes the concrete quantitative rules and execution mechanics required for live market deployment.

Professional desks never rely on ambiguous visual guesses for ascending triangle. Instead, every entry, invalidation level, and risk parameter is defined mathematically before a single order reaches the exchange gateway.

Hover over key terms below for instant definitions: Ascending Triangle, Volatility Contraction, and Vcp. For the complete mathematical derivation and edge-case analysis, open worked example & quantitative lookup matrix for breakout compression triangles.

• Ascending Triangle — Core structural driver governing compression geometry: ascending triangles, wedges & vcp breakouts.
• Volatility Contraction — Prevents premature entries and enforces mechanical discipline across Classical & Harmonic.
• Vcp — Ensures worst-case scenario losses stay strictly within predetermined R-multiple budgets.

1. 1
   1. Pre-Session Calibration & Regime Check

   Measure baseline volatility and liquidity parameters for ascending triangle prior to market open.
2. 2
   2. Mechanical Signal Confirmation

   Wait for a completed bar close confirming the volatility contraction threshold—never pre-empt mid-candle.
3. 3
   3. Risk-Normalized Sizing & Order Placement

   Compute exact lot quantity from the invalidation distance and dispatch via a Marketable Limit order.
4. 4
   4. Post-Trade Telemetry & Audit

   Log arrival price, fill slippage, and MAE/MFE metrics against the Classical & Harmonic benchmark.

Implementation & Quantitative Model

1export function isContractingSwings(depthsPct: number[]): boolean {2  return depthsPct.length >= 3 && depthsPct.every((d, i) => i === 0 || d < depthsPct[i - 1] * 0.8);3}

Cross-reference standard risk definitions such as drawdown, slippage, and Sharpe ratio when auditing your logs.