Support and Resistance (High Volume Boxes) AP Edit

// This Pine Script™ code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © ChartPrime

// 1. CHANGE VERSION TO V6
// 2. INITIALIZE BOOLEANS AS FALSE IN PINESCRIPT V6 breakout_resistance, breakout_sup, resistance_holds, support_holds
// 3. CHANGE brekout to breakout with ctrl + f
// 4. CHANGE res to resistance and sup to support
// 5. CHANGE library to strategy
// 6. If support holds: Buy, If resistance holds: sell

//@version=6
strategy("Support and Resistance (High Volume Boxes) [ChartPrime]", shorttitle = "SR Breaks and Retests [ChartPrime]", overlay=true, max_boxes_count = 50)


// ---------------------------------------------------------------------------------------------------------------------}
// 𝙐𝙎𝙀𝙍 𝙄𝙉𝙋𝙐𝙏𝙎
// ---------------------------------------------------------------------------------------------------------------------{
int   lookbackPeriod = input.int(20, "Lookback Period", minval=1, group = "Settings")
int   vol_len        = input.int(2, "Delta Volume Filter Length", tooltip = "Higher input, will filter low volume boxes"
                                                                                                   , group = "Settings")
float box_withd      = input.float(1, "Adjust Box Width", maxval = 1000, minval = 0, step = 0.1)


// ---------------------------------------------------------------------------------------------------------------------}
// 𝙄𝙉𝘿𝙄𝘾𝘼𝙏𝙊𝙍 𝘾𝘼𝙇𝘾𝙐𝙇𝘼𝙏𝙄𝙊𝙉𝙎
// ---------------------------------------------------------------------------------------------------------------------{
// Delta Volume Function
upAndDownVolume() =>
    posVol = 0.0
    negVol = 0.0

    var isBuyVolume = true

    switch
        close > open   => isBuyVolume := true
        close < open   => isBuyVolume := false

    if isBuyVolume
        posVol += volume
    else
        negVol -= volume

    posVol + negVol


// Function to identify support and resistance boxes
calcSupportResistance(src, lookbackPeriod) =>
    // Volume
    Vol    = upAndDownVolume()
    vol_hi = ta.highest(Vol/2.5, vol_len)
    vol_lo = ta.lowest(Vol/2.5, vol_len)

    var float supportLevel      = na
    var float supportLevel_1    = na
    var float resistanceLevel   = na
    var float resistanceLevel_1 = na
    var box   support               = na
    var box   resistance               = na
    var color resistance_color         = na
    var color support_color         = na
    var float multi             = na


    var bool  breakout_resistance       = false
    var bool  breakout_support       = false
    var bool  resistance_holds         = false
    var bool  support_holds         = false

    // Find pivot points
    pivotHigh = ta.pivothigh(src, lookbackPeriod, lookbackPeriod)
    pivotLow  = ta.pivotlow (src, lookbackPeriod, lookbackPeriod)
    // Box width
    atr       = ta.atr(200)
    withd     = atr * box_withd

    // Find support levels with Positive Volume
    if (not na(pivotLow)) and Vol > vol_hi

        supportLevel   := pivotLow
        supportLevel_1 := supportLevel-withd

        topLeft         = chart.point.from_index(bar_index-lookbackPeriod, supportLevel)
        bottomRight     = chart.point.from_index(bar_index, supportLevel_1)

        support_color      := color.from_gradient(Vol, 0, ta.highest(Vol, 25), color(na), color.new(color.green, 30))

        support := box.new(
                       top_left     = topLeft,
                       bottom_right = bottomRight,
                       border_color = color.green,
                       border_width = 1,
                       bgcolor      = support_color,
                       text         = "Vol: "+str.tostring(math.round(Vol,2)),
                       text_color   = chart.fg_color,
                       text_size    = size.small
                       )


    // Find resistance levels with Negative Volume
    if (not na(pivotHigh)) and Vol < vol_lo

        resistanceLevel   := pivotHigh
        resistanceLevel_1 := resistanceLevel+withd

        topLeft            = chart.point.from_index(bar_index-lookbackPeriod, resistanceLevel)
        bottomRight        = chart.point.from_index(bar_index, resistanceLevel_1)

        resistance_color         := color.from_gradient(Vol, ta.lowest(Vol, 25), 0, color.new(color.red, 30), color(na))

        resistance := box.new(
                       top_left     = topLeft,
                       bottom_right = bottomRight,
                       border_color = color.red,
                       border_width = 1,
                       bgcolor      = resistance_color,
                       text         = "Vol: "+str.tostring(math.round(Vol,2)),
                       text_color   = chart.fg_color,
                       text_size    = size.small
                       )

    // Adaptive Box Len
    support.set_right(bar_index+1)
    resistance.set_right(bar_index+1)

    // Break of support or resistance conditions
    breakout_resistance := ta.crossover(low, resistanceLevel_1)
    resistance_holds   := ta.crossunder(high, resistanceLevel)

    support_holds   := ta.crossover(low, supportLevel)
    breakout_support := ta.crossunder(high, supportLevel_1)

    // Change Color of Support to red if it was break, change color of resistance to green if it was break
    if breakout_support
        support.set_bgcolor(color.new(color.red, 80))
        support.set_border_color(color.red)
        support.set_border_style(line.style_dashed)

    if support_holds
        support.set_bgcolor(support_color)
        support.set_border_color(color.green)
        support.set_border_style(line.style_solid)

    if breakout_resistance
        resistance.set_bgcolor(color.new(color.green, 80))
        resistance.set_border_color(color.new(color.green, 0))
        resistance.set_border_style(line.style_dashed)

    if resistance_holds
        resistance.set_bgcolor(resistance_color)
        resistance.set_border_color(color.new(color.red, 0))
        resistance.set_border_style(line.style_solid)

    [supportLevel, resistanceLevel, breakout_resistance, resistance_holds, support_holds, breakout_support]


// Calculate support and resistance levels and their breakouts
[supportLevel,
         resistanceLevel,
             breakout_resistance,
                 resistance_holds,
                     support_holds,
                         breakout_support] = calcSupportResistance(close, lookbackPeriod)


// Check if Resistance become Support or Support Become Resistance
var bool resistance_is_support = false
var bool support_is_resistance = false

switch
    breakout_resistance => resistance_is_support := true
    resistance_holds   => resistance_is_support := false

switch
    breakout_support => support_is_resistance := true
    support_holds   => support_is_resistance := false


// ---------------------------------------------------------------------------------------------------------------------}
// 𝙑𝙄𝙎𝙐𝘼𝙇𝙄𝙕𝘼𝙏𝙄𝙊𝙉
// ---------------------------------------------------------------------------------------------------------------------{
// Plot resistance and support breakouts and holds
plotchar(resistance_holds, "Resistance Holds", "◆",
             color = #e92929,   size = size.tiny, location = location.abovebar, offset = -1)
plotchar(support_holds, "Support Holds",    "◆",
             color = #20ca26, size = size.tiny, location = location.belowbar, offset = -1)

plotchar(breakout_resistance and resistance_is_support[1], "Resistance as Support Holds", "◆",
             color = #20ca26, size = size.tiny, location = location.belowbar, offset = -1)
plotchar(breakout_support and support_is_resistance[1], "Support as Resistance Holds", "◆",
             color = #e92929,   size = size.tiny, location = location.abovebar, offset = -1)

// Break Out Labels
if breakout_support and not support_is_resistance[1]
    label.new(
              bar_index[1], supportLevel[1],
              text       = "Break Sup",
              style      = label.style_label_down,
              color      = #7e1e1e,
              textcolor  = chart.fg_color,
              size       = size.small
              )

if breakout_resistance and not resistance_is_support[1]
    label.new(
              bar_index[1], resistanceLevel[1],
              text       = "Break Res",
              style      = label.style_label_up,
              color      = #2b6d2d,
              textcolor  = chart.fg_color,
              size       = size.small
              )

// Define risk-reward ratio
riskRewardRatio = 2

// If resistance Hold: short
// If support Holds: Long
longCondition = (supportLevel[3] != supportLevel[1]) and (resistanceLevel > supportLevel)
shortCondition = false
//// Uncomment for mean reverting strategy
// longCondition = false
// shortCondition = (supportLevel[1] != supportLevel[0]) and (resistanceLevel > supportLevel)

plot(supportLevel, color=color.green, linewidth=2)
plot(resistanceLevel, color=color.red, linewidth=2)

if strategy.position_size == 0
    if longCondition
        strategy.entry("Long", strategy.long)
        stop = supportLevel
        limit = close + (close - supportLevel) * riskRewardRatio
        strategy.exit("TP / SL", "Long", limit = limit, stop = stop)
    if shortCondition
        strategy.entry("Short", strategy.short)
        stop = resistanceLevel
        limit = close - (resistanceLevel - close) * riskRewardRatio
        strategy.exit("TP / SL", "Short", limit = limit, stop = stop)