Order Blocks Matrix - Castle Trade

// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © Castle Trade LLC

//@version=5
indicator("Order Blocks Matrix - Castle Trade", overlay=true, max_boxes_count=500)

// --- Institutional Data Structures ---
// Matrix stores: [PriceLevel, IsBullish, StartTime, IsMitigated]
var matrix<float> ob_matrix = matrix.new<float>(0, 4)
var box[] ob_boxes = array.new_box()

// --- Input Parameters ---
int length = input.int(20, "Lookback Period", minval=1)
float threshold = input.float(1.5, "Volume Multiplier", minval=1.0)
color bull_color = input.color(color.new(color.emerald, 80), "Bullish OB Color")
color bear_color = input.color(color.new(color.crimson, 80), "Bearish OB Color")

// --- SMC Logic ---
is_engulfing_bull = close > high[1] and close[1] < open[1] and volume > ta.sma(volume, 20) * threshold
is_engulfing_bear = close < low[1] and close[1] > open[1] and volume > ta.sma(volume, 20) * threshold

if is_engulfing_bull
    // New Bullish Order Block Identified
    float ob_low = low[1]
    float ob_high = high[1]
    
    // Add to Matrix
    matrix.add_row(ob_matrix, array.from(ob_low, 1.0, float(time[1]), 0.0))
    
    // Draw on Chart
    array.push(ob_boxes, box.new(left=bar_index[1], top=ob_high, right=bar_index, bottom=ob_low, 
         bgcolor=bull_color, border_color=color.emerald, border_style=line.style_dotted))

if is_engulfing_bear
    // New Bearish Order Block Identified
    float ob_low = low[1]
    float ob_high = high[1]
    
    // Add to Matrix
    matrix.add_row(ob_matrix, array.from(ob_high, 0.0, float(time[1]), 0.0))
    
    // Draw on Chart
    array.push(ob_boxes, box.new(left=bar_index[1], top=ob_high, right=bar_index, bottom=ob_low, 
         bgcolor=bear_color, border_color=color.crimson, border_style=line.style_dotted))

// --- Mitigation Logic (No-Repaint) ---
if barstate.isconfirmed
    for i = 0 to array.size(ob_boxes) - 1
        b = array.get(ob_boxes, i)
        box.set_right(b, bar_index)
        
        // Simple mitigation check
        if low < box.get_bottom(b) or high > box.get_top(b)
            // Implementation of matrix update logic would go here for a full suite
            pass