Trend Following Strategy Based on Triple EMA and Linear Regression

/*backtest
start: 2023-01-01 00:00:00
end: 2023-02-20 00:00:00
period: 1h
basePeriod: 15m
exchanges: [{"eid":"Futures_Binance","currency":"BTC_USDT"}]
*/

// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © Wunderbit Trading

//@version=4
strategy("Automated Bitcoin (BTC) Investment Strategy", overlay=true, initial_capital=5000,pyramiding = 0, currency="USD", default_qty_type=strategy.percent_of_equity, default_qty_value=100,  commission_type=strategy.commission.percent,commission_value=0.1)

////////////  Functions

Atr(p) =>
    atr = 0.
    Tr = max(high - low, max(abs(high - close[1]), abs(low - close[1])))
    atr := nz(atr[1] + (Tr - atr[1])/p,Tr)

//TEMA
TEMA(series, length) =>
    if (length > 0)
        ema1 = ema(series, length)
        ema2 = ema(ema1, length)
        ema3 = ema(ema2, length)
        (3 * ema1) - (3 * ema2) + ema3
    else
        na
tradeType = input("LONG", title="What trades should be taken : ", options=["LONG", "SHORT", "BOTH", "NONE"])

///////////////////////////////////////////////////
/// INDICATORS
source=close

/// TREND
trend_type1 = input("TEMA", title ="First Trend Line : ", options=["LSMA", "TEMA","EMA","SMA"])
trend_type2 = input("LSMA", title ="First Trend Line : ", options=["LSMA", "TEMA","EMA","SMA"])

trend_type1_length=input(25, "Length of the First Trend Line")
trend_type2_length=input(100, "Length of the Second Trend Line")

leadLine1 = if trend_type1=="LSMA"
    linreg(close, trend_type1_length, 0)
else if trend_type1=="TEMA"
    TEMA(close,trend_type1_length)
else if trend_type1 =="EMA"
    ema(close,trend_type1_length)
else
    sma(close,trend_type1_length)

leadLine2 = if trend_type2=="LSMA"
    linreg(close, trend_type2_length, 0)
else if trend_type2=="TEMA"
    TEMA(close,trend_type2_length)
else if trend_type2 =="EMA"
    ema(close,trend_type2_length)
else
    sma(close,trend_type2_length)

p3 = plot(leadLine1, color= #53b987, title="EMA", transp = 50, linewidth = 1)
p4 = plot(leadLine2, color= #eb4d5c, title="SMA", transp = 50, linewidth = 1)
fill(p3, p4, transp = 60, color = leadLine1 > leadLine2 ? #53b987 : #eb4d5c)

//Upward Trend
UT=crossover(leadLine1,leadLine2)
DT=crossunder(leadLine1,leadLine2)

// TP/ SL/  FOR LONG
// TAKE PROFIT AND STOP LOSS
long_tp1_inp = input(15, title='Long Take Profit 1 %', step=0.1)/100
long_tp1_qty = input(20, title="Long Take Profit 1 Qty", step=1)

long_tp2_inp = input(30, title='Long Take Profit 2%', step=0.1)/100
long_tp2_qty = input(20, title="Long Take Profit 2 Qty", step=1)

long_take_level_1 = strategy.position_avg_price * (1 + long_tp1_inp)
long_take_level_2 = strategy.position_avg_price * (1 + long_tp2_inp)

long_sl_input = input(5, title='stop loss in %', step=0.1)/100
long_sl_input_level = strategy.position_avg_price * (1 - long_sl_input)

// Stop Loss
multiplier = input(3.5, "SL Mutiplier", minval=1, step=0.1)
ATR_period=input(8,"ATR period", minval=1, step=1)

// Strategy
//LONG STRATEGY CONDITION

SC = input(close, "Source", input.source)
SL1 = multiplier * Atr(ATR_period)  // Stop Loss
Trail1 = 0.0
Trail1 :=  iff(SC < nz(Trail1[1], 0) and SC[1] < nz(Trail1[1], 0), min(nz(Trail1[1], 0), SC + SL1), iff(SC > nz(Trail1[1], 0), SC - SL1, SC + SL1))
Trail1_high=highest(Trail1,50)

// iff(SC > nz(Trail1[1], 0) and SC[1] > nz(Trail1[1], 0), max(nz(Trail1[1], 0), SC - SL1),

entry_long=crossover(leadLine1,leadLine2) and Trail1_high < close
exit_long = close < Trail1_high or crossover(leadLine2,leadLine1) or close < long_sl_input_level

///// BACKTEST PERIOD ///////
testStartYear = input(2016, "Backtest Start Year")
testStartMonth = input(1, "Backtest Start Month")
testStartDay = input(1, "Backtest Start Day")
testPeriodStart = timestamp(testStartYear, testStartMonth, testStartDay, 0, 0)

testStopYear = input(9999, "Backtest Stop Year")
testStopMonth = input(12, "Backtest Stop Month")
testStopDay = input(31, "Backtest Stop Day")
testPeriodStop = timestamp(testStopYear, testStopMonth, testStopDay, 0, 0)

testPeriod() =>
    time >= testPeriodStart and time <= testPeriodStop ? true : false

if testPeriod()
    if tradeType=="LONG" or tradeType=="BOTH"
        if strategy.position_size == 0 or strategy.position_size > 0
            strategy.entry("long", strategy.long, comment="BUY", when=entry_long)
            strategy.exit("TP1", "long", qty_percent=long_tp1_qty, limit=long_take_level_1)
            strategy.exit("TP2", "long", qty_percent=long_tp2_qty, limit=long_take_level_2)
            strategy.close("long", when=exit_long, comment="SL" )


// LONG POSITION

plot(strategy.position_size > 0 ? long_take_level_1 : na, style=plot.style_linebr, color=color.green, linewidth=1, title="1st Long Take Profit")
plot(strategy.position_size > 0 ? long_take_level_2 : na, style=plot.style_linebr, color=color.green, linewidth=1, title="2nd Long Take Profit")
plot(strategy.position_size > 0 ? Trail1_high : na, style=plot.style_linebr, color=color.red, linewidth=1, title="Long Stop Loss")