Bollinger Band with Fib Golden Ratio (0.618)
// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © mohanee

//@version=4

strategy(title="Bollinger Band with Fib Golden Ratio (0.618)",  shorttitle="Bollinger Band with Fib Golden Ratio" , overlay=true, pyramiding=1,     default_qty_type=strategy.percent_of_equity,  default_qty_value=20, initial_capital=10000, currency=currency.USD)  

length = input(50,title="BB Length" , minval=1)
src1 = input(hlc3, title="Source")
//mult1 = input(1.33, minval=0.001, maxval=50)
mult = input(1.5,title="multplier", minval=0.001, maxval=50)

stopLoss=input(5,title="Stop Loss",minval=1)

basis = vwma(src1, length)
dev = mult * stdev(src1, length)

//dev3 = mult3 * stdev(src, length)

upper_618= basis + (0.618*dev)
lower_618= basis - (0.618*dev)

//lower_618_dev3= basis - (0.618*dev3)



plot_upper618= plot(upper_618, color=color.purple, linewidth=2, title="0.618")
plot(basis, color=color.purple,style=plot.style_circles,  linewidth=2)

plot_lower618= plot(lower_618, color=color.purple, linewidth=2, title="0.618 entry")
//plot_lower618_dev3= plot(lower_618_dev3, color=color.red, linewidth=1, title="0.618 stop")

//plot_lower618= plot(lower_618, color=color.purple, linewidth=1, title="0.618 entry")

ema200=ema(close,200)
ema50=ema(close,50)

plot (ema200, title="ema200", color=color.orange, linewidth=2)
plot (ema50, title="ema50", color=color.blue , linewidth=2)


longCondition= ema50 > ema200

strategy.entry(id="BB_Fib618", long=true, when = longCondition and ( close < lower_618  or  low <= lower_618)  )

strategy.close(id="BB_Fib618",  comment="points="+tostring(close - strategy.position_avg_price,  "###.##") , when = strategy.position_size >= 1  and crossover(close,upper_618 )) 

//stoploss exit
stopLossVal = strategy.position_size>=1 ?  strategy.position_avg_price * ( 1 - (stopLoss/100) ) : 0.00
strategy.close(id="BB_Fib618", comment="SL="+tostring(close - strategy.position_avg_price,  "###.##"), when=abs(strategy.position_size)>=1 and close < stopLossVal ) //and close > strategy.position_avg_price )
