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Bollinger Bands Standard Deviation Breakout Strategi

Penulis:ChaoZhang, Tarikh: 2023-11-21 17:14:04
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Ringkasan

Strategi ini berdasarkan pada penunjuk Bollinger Bands klasik. Ia pergi lama apabila harga ditutup di atas band atas dan pergi pendek apabila harga ditutup di bawah band bawah. Ia tergolong dalam trend yang mengikuti strategi pecah.

Logika Strategi

Garis asas adalah purata bergerak mudah 55 hari.
Band atas dan bawah adalah satu penyimpangan standard di atas dan di bawah garis asas masing-masing.
Isyarat panjang dihasilkan apabila harga ditutup di atas band atas.
Isyarat pendek dihasilkan apabila harga ditutup di bawah jalur bawah.
Menggunakan satu penyimpangan piawai bukannya dua penyimpangan piawai klasik mengurangkan risiko.

Analisis Kelebihan

Menggunakan penyimpangan piawai bukannya nilai tetap mengurangkan risiko.
Purata bergerak 55 hari dapat mencerminkan lebih baik trend jangka sederhana.
Penembusan dekat menapis keluar penembusan palsu.
Mudah untuk menentukan arah trend melalui analisis pelbagai jangka masa.

Analisis Risiko

Cenderung untuk membuat keuntungan kecil.
Perlu mempertimbangkan kesan yuran transaksi.
Isyarat keluar mungkin palsu keluar.
Kemungkinan kehilangan lipatan berlaku.

Risiko boleh dikurangkan dengan menetapkan stop loss, mempertimbangkan yuran urus niaga, atau menambah penapis penunjuk.

Arahan pengoptimuman

Mengoptimumkan parameter asas untuk mencari purata bergerak terbaik.
Mengoptimumkan saiz penyimpangan standard untuk mencari parameter yang optimum.
Tambah penunjuk jumlah tambahan untuk penilaian.
Tambahkan mekanisme stop loss.

Ringkasan

Logik keseluruhan strategi ini jelas. Ia menyesuaikan risiko melalui lebar jalur penyimpangan piawai dan mengelakkan pecah palsu menggunakan pecah dekat. Tetapi masih perlu untuk mengelakkan kerugian berayun dengan menggunakan stop loss, menambah penapis dll.

/*backtest
start: 2023-11-13 00:00:00
end: 2023-11-20 00:00:00
period: 1m
basePeriod: 1m
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/

//@version=4

//┌───── •••• ─────┐//
//   TradeChartist  //
//└───── •••• ─────┘//

//Bollinger Bands is a classic indicator that uses a simple moving average of 20 periods along with upper and lower bands that are 2 standard deviations away from the basis line. 
//These bands help visualize price volatility and trend based on where the price is in relation to the bands.

//This Bollinger Bands filter plots a long signal when price closes above the upper band and plots a short signal when price closes below the lower band. 
//It doesn't take into account any other parameters such as Volume/RSI/fundamentals etc, so user must use discretion based on confirmations from another indicator or based on fundamentals.

//This filter's default is 55 SMA and 1 standard deviation, but can be changed based on asset type

//It is definitely worth reading the 22 rules of Bollinger Bands written by John Bollinger. 


strategy(shorttitle="BB Breakout Strategy", title="Bollinger Bands Filter", overlay=true, 
             pyramiding=1, currency=currency.NONE , 
             initial_capital = 10000, default_qty_type = strategy.percent_of_equity, 
             default_qty_value=100, calc_on_every_tick= true, process_orders_on_close=false)

src         = input(close, title = "Source")
length      = input(55, minval=1, title = "SMA length")// 20 for classis Bollinger Bands SMA line (basis)


mult        = input(1., minval=0.236, maxval=2, title="Standard Deviation")//2 for Classic Bollinger Bands //Maxval = 2 as higher the deviation, higher the risk
basis       = sma(src, length)
dev         = mult * stdev(src,length)

CC          = input(true, "Color Bars")


upper       = basis + dev
lower       = basis - dev

//Conditions for Long and Short - Extra filter condition can be used such as RSI or CCI etc.

short       = src<lower// and rsi(close,14)<40
long        = src>upper// and rsi(close,14)>60

L1          = barssince(long)
S1          = barssince(short)

longSignal  = L1<S1 and not (L1<S1)[1]
shortSignal = S1<L1 and not (S1<L1)[1]

//Plots and Fills



////Long/Short shapes with text
// plotshape(S1<L1 and not (S1<L1)[1]?close:na, text = "sᴇʟʟ", textcolor=#ff0100, color=#ff0100, style=shape.triangledown, size=size.small, location=location.abovebar, transp=0, title = "SELL", editable = true)
// plotshape(L1<S1 and not (L1<S1)[1]?close:na, text = "ʙᴜʏ", textcolor = #008000, color=#008000, style=shape.triangleup, size=size.small, location=location.belowbar, transp=0, title = "BUY", editable = true)  


// plotshape(shortSignal?close:na, color=#ff0100, style=shape.triangledown, size=size.small, location=location.abovebar, transp=0, title = "Short Signal", editable = true)
// plotshape(longSignal?close:na, color=#008000, style=shape.triangleup, size=size.small, location=location.belowbar, transp=0, title = "Long Signal", editable = true)  



p1          = plot(upper, color=#ff0000, display=display.all, transp=75, title = "Upper Band")
p2          = plot(lower, color=#008000, display=display.all, transp=75, title = "Lower Band")


p           = plot(basis, color=L1<S1?#008000:S1<L1?#ff0000:na, linewidth=2, editable=false, title="Basis")


fill(p,p1, color=color.teal, transp=85, title = "Top Fill") //fill for basis-upper
fill(p,p2, color=color.orange, transp=85, title = "Bottom Fill")//fill for basis-lower


//Barcolor

bcol        = src>upper?color.new(#8ceb07,0): 
             src<lower?color.new(#ff0000,0):
             src>basis?color.green:
             src<basis?color.red:na


barcolor(CC?bcol:na, editable=false, title = "Color Bars")



// //Alerts ----  // Use 'Once per bar close'

// alertcondition(condition=longSignal, title="Long - BB Filter", message='BB Filter Long @ {{close}}') // Use 'Once per bar close'
// alertcondition(condition=shortSignal, title="Short - BB Filter", message='BB Filter Short @ {{close}}')  // Use 'Once per bar close'

Notestart1 = input(true, "╔═══ Time Range to BackTest ═══╗") 


// === INPUT BACKTEST RANGE ===
FromMonth = input(defval=1, title="From Month", minval=1, maxval=12)
FromDay = input(defval=1, title="From Day", minval=1, maxval=31)
FromYear = input(defval=2018, title="From Year", minval=2015)
ToMonth = input(defval=1, title="To Month", minval=1, maxval=12)
ToDay = input(defval=1, title="To Day", minval=1, maxval=31)
ToYear = input(defval=9999, title="To Year", minval=2010)

// === FUNCTION EXAMPLE === 
start = timestamp(FromYear, FromMonth, FromDay, 00, 00)  // backtest start window
finish = timestamp(ToYear, ToMonth, ToDay, 23, 59)  // backtest finish window
window() =>  // create function "within window of time"
    time >= start and time <= finish ? true : false 

if(window())
    strategy.entry("Long", long=true, when =  longSignal)
    // strategy.close("Long", when = (short and S3==0), comment = "Close Long")

if(window())
    strategy.entry("Short", long=false, when = shortSignal)
    // strategy.close("Short", when = (long and L3==0), comment = "Close Short")

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