Discussing the article: "Larry Williams Market Secrets (Part 15): Trading Hidden Smash Day Reversals with Market Context"

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Check out the new article: Larry Williams Market Secrets (Part 15): Trading Hidden Smash Day Reversals with Market Context.

Build an MQL5 Expert Advisor that automates Larry Williams Hidden Smash Day reversals. It reads confirmed signals from a custom indicator, applies context filters (Supertrend alignment and optional trading‑day rules), and manages risk with stop‑loss models based on smash‑bar structure or ATR and a fixed or risk‑based position size. The result is a reproducible framework ready for testing and extension.

A Hidden Smash Day bar is identified by the position of its closing price within its own range. For a bullish Hidden Smash setup, the bar closes in the lower portion of its range while still closing above the previous bar’s close. This configuration suggests that although the session finished higher than the previous one, the close occurred near the lower end of the day’s range, indicating potential weakness.

For a bearish Hidden Smash setup, the logic is reversed. The bar closes in the upper portion of its range while still closing below the previous bar’s close. In this case, the market appears weak relative to the prior session, but the close occurs near the top of the bar’s range, suggesting possible internal strength.

However, the Hidden Smash bar itself is not a trading signal. The setup becomes actionable only after confirmation occurs on the following bar. In this implementation, confirmation is evaluated strictly on completed bars to avoid intrabar noise and ensure reproducible behaviour during testing.

A valid buy signal follows this sequence:

  1. A bullish Hidden Smash bar is detected at bar index  2.
  2. The next bar closes above the high of that Hidden Smash bar.
  3. At the opening of the new bar, the system allows a long position to be executed.

Buy Setup

A valid sell signal mirrors this structure:

  1. A bearish Hidden Smash bar is detected at bar index 2.
  2. The next bar closes below the low of that Hidden Smash bar.
  3. At the opening of the new bar, the system allows a short position to be executed.

Sell Setup

Author: Chacha Ian Maroa

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