PMA Strategy Idea

// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © QuantCT
// Public Library URL: https://www.tradingview.com/script/5p6Mli27-PMA-Strategy-Idea/

//@version=4
strategy("PMA Strategy Idea",
         shorttitle="PMA", 
         overlay=true,
         pyramiding=0,     
         default_qty_type=strategy.percent_of_equity, 
         default_qty_value=100, 
         initial_capital=1000,           
         commission_type=strategy.commission.percent, 
         commission_value=0.075)
         
// ____ Inputs

ema1_period = input(title="EMA1 Period", defval=10)
ema2_period = input(title="EMA2 Period", defval=20)
ema3_period = input(title="EMA3 Period", defval=30)
long_only = input(title="Long Only", defval=false)
slp = input(title="Stop-loss (%)", minval=1.0, maxval=25.0, defval=5.0)
use_sl = input(title="Use Stop-Loss", defval=false)

// ____ Logic

ema1 = ema(hlc3, ema1_period)
ema2 = ema(hlc3, ema2_period)
ema3 = ema(hlc3, ema3_period)
    
enter_long = (rising(ema1, 1) and rising(ema2, 1) and rising(ema3, 1))
exit_long = not enter_long
enter_short = (falling(ema1, 1) and falling(ema2, 1) and falling(ema3, 1))
exit_short = not enter_short

strategy.entry("Long", strategy.long, when=enter_long)
strategy.close("Long", when=exit_long) 
if (not long_only)
    strategy.entry("Short", strategy.short, when=enter_short)
    strategy.close("Short", when=exit_short) 

// ____ SL

sl_long = strategy.position_avg_price * (1- (slp/100))
sl_short = strategy.position_avg_price * (1 + (slp/100))
if (use_sl)
    strategy.exit(id="SL", from_entry="Long", stop=sl_long)
    strategy.exit(id="SL", from_entry="Short", stop=sl_short)

// ____ Plots

colors = 
 enter_long ? #27D600 :
 enter_short ? #E30202 :
 color.orange

ema1_plot = plot(ema1, color=colors)
ema2_plot = plot(ema2, color=colors)
ema3_plot = plot(ema3, color=colors)
fill(ema1_plot, ema3_plot, color=colors, transp=50)