//@version=5
strategy("Pure Price Action Supply and Demand Strategy - JeaFx", overlay=true, initial_capital=10000, default_qty_type=strategy.percent_of_equity, default_qty_value=2, commission_type=strategy.commission.percent, commission_value=0.03)

// --- Inputs ---
pivot_length   = input.int(5, "Pivot Lookback Length", minval=1, tooltip="Bars required to identify swing highs and lows")
rr_ratio       = input.float(2.5, "Risk to Reward Ratio", minval=1.0, step=0.1, tooltip="Minimum R:R ratio per trade")
use_confirmation = input.bool(false, "Require Low Timeframe Structure Confirmation", tooltip="Wait for secondary break before entering")

// --- Swing Highs and Lows ---
ph = ta.pivothigh(pivot_length, pivot_length)
pl = ta.pivotlow(pivot_length, pivot_length)

var float last_swing_high = na
var float last_swing_low  = na
var int market_structure  = 0 // 1 = Uptrend, -1 = Downtrend

if not na(ph)
    last_swing_high := ph

if not na(pl)
    last_swing_low := pl

// --- Supply & Demand Zones ---
var float demand_top = na
var float demand_bot = na
var bool demand_active = false

var float supply_top = na
var float supply_bot = na
var bool supply_active = false

// --- Market Structure Break (BOS) Logic ---
bullish_bos = not na(last_swing_high) and ta.crossover(close, last_swing_high)
bearish_bos = not na(last_swing_low) and ta.crossunder(close, last_swing_low)

if bullish_bos
    market_structure := 1
    // Identify last consolidation (demand zone) before the break
    demand_top := high[pivot_length]
    demand_bot := low[pivot_length]
    demand_active := true
    last_swing_high := na // Reset after break

if bearish_bos
    market_structure := -1
    // Identify last consolidation (supply zone) before the break
    supply_top := high[pivot_length]
    supply_bot := low[pivot_length]
    supply_active := true
    last_swing_low := na // Reset after break

// Invalidate zones if price breaks through them completely
if demand_active and close < demand_bot
    demand_active := false

if supply_active and close > supply_top
    supply_active := false

// --- Entry Conditions ---
long_condition  = market_structure == 1 and demand_active and low <= demand_top and high >= demand_bot
short_condition = market_structure == -1 and supply_active and high >= supply_bot and low <= supply_top

// --- Strategy Execution ---
if long_condition and strategy.position_size == 0
    stop_loss = demand_bot
    risk = close - stop_loss
    if risk > 0
        take_profit = close + (risk * rr_ratio)
        strategy.entry("Long Demand", strategy.long)
        strategy.exit("TP/SL Long", "Long Demand", stop=stop_loss, limit=take_profit)
        demand_active := false

if short_condition and strategy.position_size == 0
    stop_loss = supply_top
    risk = stop_loss - close
    if risk > 0
        take_profit = close - (risk * rr_ratio)
        strategy.entry("Short Supply", strategy.short)
        strategy.exit("TP/SL Short", "Short Supply", stop=stop_loss, limit=take_profit)
        supply_active := false

// --- Plotting ---
plot(last_swing_high, "Swing High", color=color.red, style=plot.style_line, offset=-pivot_length)
plot(last_swing_low, "Swing Low", color=color.green, style=plot.style_line, offset=-pivot_length)

// Plot active demand zone
p_d_top = plot(demand_active ? demand_top : na, "Demand Top", color=color.new(color.green, 50), style=plot.style_line)
p_d_bot = plot(demand_active ? demand_bot : na, "Demand Bottom", color=color.new(color.green, 50), style=plot.style_line)
fill(p_d_top, p_d_bot, color=demand_active ? color.new(color.green, 85) : na, title="Demand Zone Fill")

// Plot active supply zone
p_s_top = plot(supply_active ? supply_top : na, "Supply Top", color=color.new(color.red, 50), style=plot.style_line)
p_s_bot = plot(supply_active ? supply_bot : na, "Supply Bottom", color=color.new(color.red, 50), style=plot.style_line)
fill(p_s_top, p_s_bot, color=supply_active ? color.new(color.red, 85) : na, title="Supply Zone Fill")