//@version=5

indicator("Supply Demand Zones Pro", overlay=true, max_boxes_count=500)

// COLORS

demandColor = color.new(color.green,85)

supplyColor = color.new(color.red,85)

// CANDLE TYPES

isRally(i)=>

    close[i] > open[i]

isDrop(i)=>

    close[i] < open[i]

// STRONG CANDLE

isStrong(i)=>

    body = math.abs(close[i]-open[i])

    rng = high[i]-low[i]

    body >= rng * 0.60

// BASE CANDLE

isBase(i)=>

    body = math.abs(close[i]-open[i])

    rng = high[i]-low[i]

    body <= rng * 0.70

// ARRAYS

var demandZones = array.new_box()

var supplyZones = array.new_box()

var demandBars = array.new_int()

var supplyBars = array.new_int()

// CREATE DEMAND

createDemand(startPrice,endPrice)=>

    top = math.max(startPrice,endPrice)

    bottom = math.min(startPrice,endPrice)

    b = box.new(bar_index-1,top,bar_index+10,bottom,

     bgcolor=demandColor,border_color=color.green)

    array.push(demandZones,b)

    array.push(demandBars,bar_index)

// CREATE SUPPLY

createSupply(startPrice,endPrice)=>

    top = math.max(startPrice,endPrice)

    bottom = math.min(startPrice,endPrice)

    b = box.new(bar_index-1,top,bar_index+10,bottom,

     bgcolor=supplyColor,border_color=color.red)

    array.push(supplyZones,b)

    array.push(supplyBars,bar_index)

// REMOVE DEMAND

removeDemand()=>

    i = array.size(demandZones)-1

    while i >= 0

        z = array.get(demandZones,i)

        created = array.get(demandBars,i)

        zoneHigh = box.get_top(z)

        if bar_index > created + 2 and low <= zoneHigh

            box.delete(z)

            array.remove(demandZones,i)

            array.remove(demandBars,i)

        i := i-1

// REMOVE SUPPLY

removeSupply()=>

    i = array.size(supplyZones)-1

    while i >= 0

        z = array.get(supplyZones,i)

        created = array.get(supplyBars,i)

        zoneLow = box.get_bottom(z)

        if bar_index > created + 2 and high >= zoneLow

            box.delete(z)

            array.remove(supplyZones,i)

            array.remove(supplyBars,i)

        i := i-1

// PATTERN DETECTION

if bar_index > 3

    // DBR DEMAND

    if isDrop(2) and isBase(1) and isRally(0) and isStrong(0)

        start = math.max(open[1],close[1])

        endp = math.min(low[2],low[1])

        createDemand(start,endp)

    // RBR DEMAND

    if isRally(2) and isBase(1) and isRally(0) and isStrong(0)

        start = math.max(open[1],close[1])

        endp = low[1]

        createDemand(start,endp)

    // RBD SUPPLY

    if isRally(2) and isBase(1) and isDrop(0) and isStrong(0)

        start = math.min(open[1],close[1])

        endp = math.max(high[2],high[1])

        createSupply(start,endp)

    // DBD SUPPLY

    if isDrop(2) and isBase(1) and isDrop(0) and isStrong(0)

        start = math.min(open[1],close[1])

        endp = high[1]

        createSupply(start,endp)

// DELETE USED ZONES

removeDemand()

removeSupply()

//@version=5

strategy("Swing Trend Strategy PRO (Sideways Filtered) | Nifty 500",

     overlay=true,

     initial_capital=100000,

     default_qty_type=strategy.percent_of_equity,

     default_qty_value=100,

     pyramiding=0,

     process_orders_on_close=true)

// INPUTS

stopLossPercent = input.float(8.0, "Stop Loss %", minval=1)

rsiLength = input.int(14, "RSI Length")

emaFastLength = input.int(20, "Fast EMA")

emaMidLength = input.int(50, "Mid EMA")

emaLongLength = input.int(200, "Long EMA")

adxLength = input.int(14, "ADX Length")

adxThreshold = input.float(20, "ADX Minimum Trend Strength")

// INDICATORS

emaFast = ta.ema(close, emaFastLength)

emaMid  = ta.ema(close, emaMidLength)

emaLong = ta.ema(close, emaLongLength)

rsiVal  = ta.rsi(close, rsiLength)

[diplus, diminus, adxVal] = ta.dmi(adxLength, adxLength)

// TREND CONDITIONS

trendUp = close > emaLong and emaMid > emaLong

strongTrend = adxVal > adxThreshold

// ENTRY CONDITION

entryCondition = trendUp and strongTrend and close > emaFast and ta.crossover(rsiVal, 55)

if entryCondition

    strategy.entry("LONG", strategy.long)

// STOP LOSS

stopPrice = strategy.position_avg_price * (1 - stopLossPercent / 100)

if strategy.position_size > 0

    strategy.exit("SL", from_entry="LONG", stop=stopPrice)

// TREND EXIT

trendExit = close < emaMid

if strategy.position_size > 0 and trendExit

    strategy.close("LONG")

// PLOTS

plot(emaFast, title="20 EMA", color=color.orange, linewidth=2)

plot(emaMid, title="50 EMA", color=color.blue, linewidth=2)

plot(emaLong, title="200 EMA", color=color.red, linewidth=2)

// Execution markers

longOpened = strategy.position_size > 0 and strategy.position_size[1] == 0

longClosed = strategy.position_size == 0 and strategy.position_size[1] > 0

plotshape(longOpened,

     title="BUY",

     style=shape.labelup,

     location=location.belowbar,

     color=color.green,

     text="BUY")

plotshape(longClosed,

     title="SELL",

     style=shape.labeldown,

     location=location.abovebar,

     color=color.red,

     text="SELL")