Get Supply and demand trading strategy Code That Actually Works

//@version=5
indicator("HorizonAI - Supply and Demand Zones", overlay=true, max_boxes_count=50)

// Input Parameters
lookback = input.int(20, "Lookback Period", minval=5)
zoneMult = input.float(2.0, "Zone Width Multiplier", step=0.1)
showLabels = input.bool(true, "Show Zone Labels")

// Identify Imbalance / Supply & Demand Logic
float high_max = ta.highest(high, lookback)
float low_min = ta.lowest(low, lookback)

// Simple Supply Zone: Large bearish candle after a peak
isSupply = high[1] == ta.highest(high, 10) and close < open and (open - close) > ta.atr(14) * zoneMult
// Simple Demand Zone: Large bullish candle after a trough
isDemand = low[1] == ta.lowest(low, 10) and close > open and (close - open) > ta.atr(14) * zoneMult

// State management for boxes
var box supplyBox = na
var box demandBox = na

if isSupply
    supplyBox := box.new(left=bar_index[1], top=high[1], right=bar_index + 10, bottom=math.max(open[1], close[1]), 
         bgcolor=color.new(color.red, 80), border_color=color.red, extend=extend.right)
    if showLabels
        label.new(bar_index, high[1], "Supply", color=color.red, style=label.style_label_down, textcolor=color.white, size=size.small)

if isDemand
    demandBox := box.new(left=bar_index[1], top=math.min(open[1], close[1]), right=bar_index + 10, bottom=low[1], 
         bgcolor=color.new(color.green, 80), border_color=color.green, extend=extend.right)
    if showLabels
        label.new(bar_index, low[1], "Demand", color=color.green, style=label.style_label_up, textcolor=color.white, size=size.small)

// Alert Conditions
alertcondition(isSupply, title="Supply Zone Formed", message="Institutional Supply Zone detected on {{ticker}}")
alertcondition(isDemand, title="Demand Zone Formed", message="Institutional Demand Zone detected on {{ticker}}")

plot(ta.atr(14), "ATR Monitor", color=color.new(color.gray, 100)) // Hidden plot for calculation