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2. ブル・フラグ・ブレークアウト戦略

ブル・フラグ・ブレークアウト戦略

作者: リン・ハーンチャオチャン,日付: 2024-02-22 16:41:04
タグ:

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/*backtest
start: 2024-01-22 00:00:00
end: 2024-02-21 00:00:00
period: 1h
basePeriod: 15m
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/

// © smith26
//This strategy enters on a bull flag and closes position 6 bars later.  Average true range is used instead of a moving average.
//The reason for ATR instead of MA is because with volatile securities, the flagpole must stand up a noticable "distance" above the trading range---which you can't determine with a MA alone.
//This is broken up into multiple parts: Defining a flagpole, defining the pole height, and defining the flag, which will be constrained to the top third (33%) of the pole height to be considered a flag.
//@version=4
strategy("Bull Flag v1.00", overlay=true)

ATR = atr(10) //Average True Range over last 10 bars.

upperATR = ohlc4[1] + ATR[1]  //Open + High + Low + Close divided by 4, + prior ATR.  Just used here for visually plotting the ATR upper channel.
lowerATR = ohlc4[1] - ATR[1] //Open + High + Low + Close divided by 4, - prior ATR.  Just used here for visually plotting the ATR lower channel.

//uncomment these two lines to see ATR channels
plot(upperATR, color=color.orange)
plot (lowerATR, color=color.orange)

//Current close higher than previous close, and current close minus current open is greater than 3 times the previous ATR.  "3x ATR" is chosen because any less was not a noticeable distance above the trading range.
flagpole1 = close>close[1] and (close-open) > (ATR[1] * 3)
plotshape(flagpole1, text="flagpole1", style=shape.arrowdown, size=size.huge) //Plots an arrow for flagpole1 for QA testing

//Two consecutive close higer than their previous close, and current close minus PREVIOUS open is greater than 3 times the previous ATR.
flagpole2 = close>close[1] and close[1]>close[2] and (close-open[1]) > (ATR[1] * 3)
plotshape(flagpole2, text="flagpole2", style=shape.arrowdown, size=size.huge, color=color.yellow) //Plots an arrow for flagpole2 for QA testing

//Three consecutive close higer than their previous close, and current close minus open from 2 bars ago is greater than 3 times the previous ATR.
flagpole3 = close>close[1] and close[1]>close[2] and close[2]>close[3] and (close-open[2]) > (ATR[1] * 3)
plotshape(flagpole3, text="flagpole3", style=shape.arrowdown, size=size.huge, color=color.white) //Plots an arrow for flagpole3 for QA testing

//A flagpole can be any of the three definitions of flagpole.
flagpole = flagpole1 or flagpole2 or flagpole3

//This will return the number of bars since "flagpole" was true.  Not being used, but could be useful.
//since_flagpole = barssince(flagpole)

after_pole_1 = flagpole[1] //This marks the bar directly after a flagpole.  
//plotshape(after_pole_1, text="after_pole_1", style=shape.cross, size=size.large, color=color.white) //Plots a cross for after_pole_1 for QA testing
after_pole_2 = flagpole[2] //This marks the bar two bars after a flagpole.  
after_pole_3 = flagpole[3] //This marks the bar three bars after a flagpole.  

//This returns the price at the "top" of the flagpole (using close price) at the most recent occurence, 0.
pole_top = valuewhen(flagpole, close, 0)
//plot(pole_top, trackprice=true)  //plots a horizontal line at the most recent pole_top

//Measures the distance between last pole top and the previous SMA.
pole_height = pole_top - sma(close, 10)[1] 
//plot(pole_height)

//This marks 33% below the pole_top, which will be the lowest point a flag can be.
flag_bottom = pole_top - (.33 * pole_height)
//plot(flag_bottom)

//The first, second, and third bars after the pole are considered part of a flag when open and close are between the pole_top and flag_bottom
flag1 = after_pole_1 and (open >= flag_bottom) and (open <= pole_top) and (close >= flag_bottom) and (close <= pole_top)
//plotshape(flag1, text="flag1", style=shape.flag, size=size.large, color=color.teal)
flag2 = after_pole_2 and (open >= flag_bottom) and (open <= pole_top) and (close >= flag_bottom) and (close <= pole_top)
//plotshape(flag2, text="flag2", style=shape.flag, size=size.large, color=color.teal)
flag3 = after_pole_3 and (open >= flag_bottom) and (open <= pole_top) and (close >= flag_bottom) and (close <= pole_top)
//plotshape(flag3, text="flag3", style=shape.flag, size=size.large, color=color.teal)

//When all three bars after a flagpole are a flag, the criteria are met and we have a "bull_flag"
//Specifically, when current bar is flag3, previous bar is flag2, and 2 bars ago is flag1, we have a bull_flag.
bull_flag = flag3 and flag2[1] and flag1[2]
plotshape(bull_flag, text="bull_flag", style=shape.flag, size=size.large, color=color.white) //Plots a flag for bull_flag for QA testing


if (bull_flag)
    strategy.entry("Long", strategy.long)

if barssince(bull_flag) == 6 //close 6 bars after entry.
    strategy.close("Long")

---

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