スーパートレンドとフィッシャー変換に基づくトレンドフォロー長期戦略

/*backtest
start: 2023-10-26 00:00:00
end: 2023-11-02 00:00:00
period: 1m
basePeriod: 1m
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/

//@version=5
strategy("Supertrend and Fisher_LONG", overlay=true)

//This block is for  Fisher Transformation Calculation.
len = input.int(10, minval=1, title="Length") // Length is optional. 10 is good but is up to you.
high_ = ta.highest(hl2, len)
low_ = ta.lowest(hl2, len)
round_(val) => val > .99 ? .999 : val < -.99 ? -.999 : val
value = 0.0
value := round_(.66 * ((hl2 - low_) / (high_ - low_) - .5) + .67 * nz(value[1]))
fish1 = 0.0
fish1 := .5 * math.log((1 + value) / (1 - value)) + .5 * nz(fish1[1])
fish2 = fish1[1]

// Buy condition for Fisher transformation.
buy_signal = (fish1 < -2.5) and (fish1 > fish2)
durum = 0 //just for the situation.

if (buy_signal)
    durum := 1 // now it changes from 0 to 1.

// Supertrend indicator inputs and calculations (same as in the indicator)
Periods = input(title='ATR Period', defval=10) // period is 10, but you can change it
src = input(hl2, title='Source')
Multiplier = input.float(title='ATR Multiplier', step=0.1, defval=2) //atr multiplier is important. it is 2 for this strategy but you can find another for best performance 
RiskAmount = input.float(title='Risk Amount ($)', defval=10.0, minval=0.0, step=1.0) // ıf you use risk-reward method, risk is 10$ for each position. you can also change it
changeATR = input(title='Change ATR Calculation Method ?', defval=true)

atr2 = ta.sma(ta.tr, Periods)
atr = changeATR ? ta.atr(Periods) : atr2
up = src - Multiplier * atr
up1 = nz(up[1], up)
up := close[1] > up1 ? math.max(up, up1) : up
dn = src + Multiplier * atr
dn1 = nz(dn[1], dn)
dn := close[1] < dn1 ? math.min(dn, dn1) : dn
trend = 1
trend := nz(trend[1], trend)
trend := trend == -1 and close > dn1 ? 1 : trend == 1 and close < up1 ? -1 : trend

// Calculate position size based on risk amount
riskPerContract = atr * Multiplier
contracts = RiskAmount / (riskPerContract * syminfo.mintick)

//short signal condition
buySignal = trend == 1 and trend[1] == -1 and durum == 1

plotshape(buySignal, title='Buy Signal', location=location.belowbar, color=color.green, style=shape.triangleup, size=size.small)

// variables
var float entryPrice = na
var float stopLoss = na
var float takeProfit = na
var float atr1 = na
var float takeProfit2 = na
var float takeProfit3 = na

//it calculates the stop level and reward profit levels using atr.
if (buySignal)
    entryPrice := close
    atr1 := atr
    stopLoss := entryPrice - atr1 * Multiplier
    contracts := entryPrice / (entryPrice - stopLoss) * RiskAmount / entryPrice
    takeProfit := entryPrice + atr1 * Multiplier
    takeProfit2 := entryPrice + 2 * atr1 * Multiplier
    takeProfit3 := entryPrice + 3 * atr1 * Multiplier

if (buySignal)
    strategy.entry("Buy", strategy.long, qty=contracts)

// 
if (close <= stopLoss)
    strategy.close("Buy", comment="Stop Loss Hit")
else if (close >= takeProfit)
    strategy.close("Buy", comment="Take Profit Hit")

// draw the stop, entry and profit levels
plot(stopLoss, title="Stop Loss", color=color.red, linewidth=1, style=plot.style_linebr)
plot(entryPrice, title="Entry Price", color=color.orange, linewidth=1, style=plot.style_linebr)
plot(takeProfit, title="Take Profit", color=color.green, linewidth=1, style=plot.style_linebr)
plot(takeProfit2, title="Take Profit 2", color=color.blue, linewidth=1, style=plot.style_linebr)
plot(takeProfit3, title="Take Profit 3", color=color.purple, linewidth=1, style=plot.style_linebr)