instrument {
    name = 'BB BUY SELL',
    icon = 'indicators:MA',
    overlay = true
}

BB_length = input(14, "BB_length", input.integer, 1)
BB_sdev   = input(2.0, "BB_sdev", input.double, 0.001)

----BB
dev = BB_sdev * stdev(close, BB_length) 

upperb = sma(close, BB_length) + dev
medium = sma(close, BB_length)
lowerb = sma(close, BB_length) - dev 

plot(medium, "medium", rgba(192, 23, 6, 1), 2 )
fill(lowerb, upperb, "", rgba(32, 202, 36, 0.08)) 

--RSI
source = input(1, "Source", input.string_selection, inputs.titles)
local src  = inputs[source]  

len    = input(2, "RSI Period", input.integer, 1)
lowerr = input(30, "lowerr", input.double, 0, 100, 1) 
upperr = input(70, "upperr", input.double, 0, 100, 1)

rsx    = rsi(src, len) 
--print(rsx)
-----BB+RSI Strategy ---------------
showIndicator = (rsx > upperr and close > open and close[1] > open[1]) or (rsx < lowerr and close < open and close[1] < open[1])
--print(showIndicator)
if showIndicator == true then 
    sell = rsx > upperr and (close > upperb)
    buy  = rsx < lowerr and (close < lowerb)
    
plot_shape(sell, "sell", shape_style.arrowdown, shape_size.large, "red", shape_location.abovebar, 0, "Put", "red") 
plot_shape(buy, "buy", shape_style.arrowup, shape_size.large, "green", shape_location.belowbar, 0, "Call", "green")

end