Previous Day Levels & BOS (v4.0.0)Indicator Overview
This custom Pine Script v6 trading indicator combines Previous Day High/Low (PDH/PDL) boundary tracking, multi-trigger Break Signals, and Break of Structure (BOS) logic into a unified, clean charting tool. Designed for precision execution, the script tracks session boundaries strictly using calendar days to prevent Sunday and Monday session combining, while enforcing structural constraints on market structure breaks.
Core Functional Components
Previous Day Levels: Plots dynamic lines representing the high and low of the previous calendar day, adapting automatically as sessions roll over.
Break Signals: Evaluates multi-trigger crosses against PDH and PDL bounds, printing designated arrows whenever price breaks these key liquidity thresholds.
Structure Breaks (BOS): Identifies swing highs and lows post-PD break, restricting BOS prints strictly within the boundaries of the Previous Day High and Low levels.
Alert System: Fully equipped with built-in native alerts for bullish, bearish, and any combined BOS events.
Complete Revision History
v1.0.0: Established initial session logic and PDH/PDL level plotting.
v1.1.0: Transitioned to strict calendar day tracking to fix Sunday and Monday session combining issues.
v1.2.0: Introduced built-in alert conditions for Bullish, Bearish, and Any BOS configurations.
v1.3.0: Enforced sequence rules requiring a PD break before evaluating BOS structures.
v1.4.0: Removed price boundary filters on post-PD break swings to capture broader structural setups.
v1.5.0: Explicitly anchored version 6 header at line 1 to resolve compiler issues.
v1.6.0: Upgraded the BOS engine to utilize array tracking, preventing swing point overwriting.
v1.7.0: Added automated removal for BOS lines and labels upon level mitigation.
v1.8.0: Resolved loop execution errors by computing crossover logic outside array loops.
v1.9.0: Reverted mitigation deletion rules so BOS elements remain visible post-PD break.
v2.0.0: Overhauled the BOS engine to active single-level tracking to minimize chart clutter.
v2.1.0: Enforced strict boundary filtering to ensure BOS markers print exclusively inside PDH and PDL channels.
v2.2.0: Enabled multi-trigger tracking so every unique cross above PDH or below PDL prints an arrow signal.
v3.1.0 - v3.2.0: Experimental Fair Value Gap (FVG) and mitigation engines introduced and tested.
v4.0.0: Cleaned and streamlined the script by completely removing experimental FVG features, finalizing the layout down to core PD levels, break arrows, and precision BOS tracking.
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