Position Sizing Label

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

//@version=4
study(title="Position Sizing Label", shorttitle="Position Sizing", overlay=true)

// Only show content if on a daily timeframe
onDailyChart = timeframe.isdaily


//Supertrend


Supertrend(Factor, Pd) =>
    Up=hl2-(Factor*atr(Pd))
    Dn=hl2+(Factor*atr(Pd))
    
    TrendUp = 0.0
    TrendUp := close[1]>TrendUp[1] ? max(Up,TrendUp[1]) : Up
    TrendDown = 0.0
    TrendDown := close[1]<TrendDown[1]? min(Dn,TrendDown[1]) : Dn
    Trend = 0.0
    Trend := close > TrendDown[1] ? 1: close< TrendUp[1]? -1: nz(Trend[1],1)
    Tsl = Trend==1? TrendUp: TrendDown
    
    S_Buy = Trend == 1 ? 1 : 0
    S_Sell = Trend != 1 ? 1 : 0
    
    [Trend, Tsl]

[Trend1,Tsl1] = Supertrend(3, 7)
[Trend2,Tsl2] = Supertrend(3, 7)
[Trend3,Tsl3] = Supertrend(3, 10)

ST1_Trend_MTF = security(syminfo.tickerid, "W", Trend1, lookahead=barmerge.lookahead_on)
ST1_Tsl_MTF = security(syminfo.tickerid, "W", Tsl1, lookahead=barmerge.lookahead_on)
ST2_Trend_MTF = security(syminfo.tickerid, "D", Trend2, lookahead=barmerge.lookahead_on)
ST2_Tsl_MTF = security(syminfo.tickerid, "D", Tsl2, lookahead=barmerge.lookahead_on)
ST3_Trend_MTF = security(syminfo.tickerid, "60", Trend3, lookahead=barmerge.lookahead_on)
ST3_Tsl_MTF = security(syminfo.tickerid, "60", Tsl3, lookahead=barmerge.lookahead_on)

//linecolor = ST2_Trend_MTF == 1 ? color.green : color.red

//plot(ST2_Tsl_MTF, color = linecolor, linewidth = 2,title = "SuperTrend")

UDST = ST2_Tsl_MTF[1] * 1.03
DDST = ST2_Tsl_MTF[1] * 0.97


WST = (close - ST1_Tsl_MTF) * 100 / close
DST = (close - ST2_Tsl_MTF) * 100 / close
HST = (close - ST3_Tsl_MTF) * 100 / close


// -----------------------POSITION SIZING------------------------

capital           = input(1000000, "Capital")
riskPercent      = input(0.5, "Risk")
riskPercentD      = 2.0
riskPercentO      = 1.0
riskPercentH      = 0.5
riskPercentQ      = 0.25

stopLoss = ST2_Tsl_MTF
target = close + (3 * (close - stopLoss))


suggestQuantity(price, capital, riskPercent, stopLoss) =>
    // Max Loss Per Trade
    maxCapitalLoss = (capital * riskPercent) / 100
    // SL and position size calculation
    valueLossPerShare = abs(price - stopLoss)
    // Calculate and return quantity
    floor(maxCapitalLoss / valueLossPerShare)
    
    
maxAffordableQuantity = floor(capital / close)

// Calculate trade size

quantity = suggestQuantity(close, capital, riskPercent, stopLoss)
suggestedTradeVolume = quantity * close
affordableQuantity = (suggestedTradeVolume > capital) ? maxAffordableQuantity : quantity



// -----------------------LABEL------------------------

    
lt1=tostring(affordableQuantity,'#.##')
//lt2=tostring(target,'#.##')



lcolor = (DST < 1 ? color.rgb(240, 83, 80) : color.rgb(38, 166, 154))

ourlabel= label.new(x=bar_index,y=na,yloc=yloc.belowbar,color=lcolor ,style=label.style_label_up, text="Qty: "+lt1,textcolor=color.white)
label.delete(ourlabel[1])

//ourlabel= label.new(x=bar_index,y=na,yloc=yloc.belowbar,color=lcolor ,style=label.style_label_up, text="Qty: "+lt1+"\nTgt: "+lt2,textcolor=color.white)
label.delete(ourlabel[1])