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//@version=5
strategy("EMA Scalping Strategy", overlay=true, initial_capital = 0)

// Define EMAs
capital=input(100)
leverage =input(1)
risk_reward_ratio=input(1.5)
trade_NewYork=input(true)
trade_London=input(true)
trade_Tokyo=input(true)
trade_Sydney=input(true)
ema1_length=input(25)
ema2_length=input(50)
ema3_length=input(100)

ema1 = ta.ema(close, ema1_length)
ema2 = ta.ema(close, ema2_length)
ema3 = ta.ema(close, ema3_length)

// Plot EMAs on the chart
plot(ema1, color=color.blue)
plot(ema2, color=color.orange)
plot(ema3, color=color.red)

// Define spread condition for Buy and Short scenarios
buyCondition = (ema1 > ema2+0.0001) and (ema2 > ema3+0.0001) and close>ema1 and close>open and (ema1[7] > ema2[7]+0.0001) and (ema2[7] > ema3[7]+0.0001)
shortCondition = (ema3 > ema2+0.0001) and (ema2 > ema1+0.0001) and close<ema1 and close<open and (ema3[7] > ema2[7]+0.0001) and (ema2[7] > ema1[7]+0.0001)

// Define Buy signal
longSignal = low<ema1 and buyCondition 

// Define Short signal
shortSignal = high>ema1 and shortCondition 

// Cancel setup conditions
cancelLongSetup = (low<ema3)or(low[1]<ema3[1])or(low[2]<ema3[2])or(low[3]<ema3[3])or(low[4]<ema3[4])or(low[5]<ema3[5])or(low[6]<ema3[6])or(low[7]<ema3[7])
cancelShortSetup = (high>ema3)or(high[1]>ema3[1])or(high[2]>ema3[2])or(high[3]>ema3[3])or(high[4]>ema3[4])or(high[5]>ema3[5])or(high[6]>ema3[6])or(high[7]>ema3[7])

inNY = trade_NewYork and time > timestamp(year, month, dayofmonth, 09, 00) and time < timestamp(year, month, dayofmonth, 18, 00)

inLO = trade_London and time > timestamp(year, month, dayofmonth, 03, 00) and time < timestamp(year, month, dayofmonth, 12, 00)

inTO = trade_Tokyo and (time > timestamp(year, month, dayofmonth, 20, 00) or time < timestamp(year, month, dayofmonth, 05, 00))

inSY = trade_Sydney and (time > timestamp(year, month, dayofmonth, 17, 00) or time < timestamp(year, month, dayofmonth, 02, 00))

var int barsSincePattern1 = 0
shouldPlot1 = longSignal and (barsSincePattern1 >= 10 or na(barsSincePattern1))
if (inNY or inLO or inSY or inTO)
    if (shouldPlot1 and not cancelLongSetup and strategy.opentrades == 0)
        strategy.entry("Buy", strategy.long, qty=capital*leverage)
        alert("Buy", alert.freq_all)
        strategy.exit("Exit", "Buy", stop=ema2, limit=close+(risk_reward_ratio*(close-ema2)))
    barsSincePattern1 := shouldPlot1 ? 0 : barsSincePattern1 + 1

var int barsSincePattern = 0
shouldPlot = shortSignal and (barsSincePattern >= 10 or na(barsSincePattern))
if (inNY or inLO or inSY or inTO)
    if (shouldPlot and not cancelShortSetup and strategy.opentrades == 0)
        strategy.entry("Short", strategy.short, qty=capital*leverage)
        alert("Sell", alert.freq_all)
        strategy.exit("Exit", "Short", stop=ema2, limit=close-(risk_reward_ratio*(ema2-close)))
    barsSincePattern := shouldPlot ? 0 : barsSincePattern + 1