Chiến lược này dựa trên chỉ số Bollinger Bands cổ điển. Nó đi dài khi giá đóng trên dải trên và đi ngắn khi giá đóng dưới dải dưới. Nó thuộc về xu hướng sau chiến lược đột phá.
Rủi ro có thể được giảm thiểu bằng cách thiết lập dừng lỗ, xem xét phí giao dịch hoặc thêm bộ lọc chỉ số.
Lý thuyết tổng thể của chiến lược này là rõ ràng. Nó điều chỉnh rủi ro thông qua chiều rộng băng tần độ lệch chuẩn và tránh breakout sai bằng cách sử dụng breakout gần. Nhưng vẫn cần thiết để ngăn ngừa tổn thất dao động bằng cách sử dụng dừng lỗ, thêm bộ lọc vv
/*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")