//---- RSI divergence


//indicator(title="Relative Strength Index", format=format.price, precision=2, timeframe="", timeframe_gaps=true)

ma(source, length, type) =>
    switch type
        "EMA" => ta.ema(source, length)
        "SMMA (RMA)" => ta.rma(source, length)
        "WMA" => ta.wma(source, length)
        "VWMA" => ta.vwma(source, length)

//rsiLengthInput = input.int(14, minval=1, title="RSI Length", group="RSI Settings")
//rsiSourceInput = input.source(close, "Source", group="RSI Settings")
//maTypeInput = input.string("EMA", title="MA Type", options=["EMA", "SMMA (RMA)", "WMA", "VWMA"], group="MA Settings")
//maLengthInput = input.int(14, title="MA Length", group="MA Settings")
rsiLengthInput=14
rsiSourceInput = close
maLengthInput = 14
maTypeInput ="EMA"
showDivergence =true

up = ta.rma(math.max(ta.change(rsiSourceInput), 0), rsiLengthInput)
down = ta.rma(-math.min(ta.change(rsiSourceInput), 0), rsiLengthInput)
rsi = down == 0 ? 100 : up == 0 ? 0 : 100 - (100 / (1 + up / down))
rsiMA = ma(rsi, maLengthInput, maTypeInput)


// Divergence
lookbackRight = 5
lookbackLeft = 5
rangeUpper = 60
rangeLower = 5
bearColor = color.red
bullColor = color.green
textColor = color.white
noneColor = color.new(color.white, 100)

plFound = na(ta.pivotlow(rsi, lookbackLeft, lookbackRight)) ? false : true
phFound = na(ta.pivothigh(rsi, lookbackLeft, lookbackRight)) ? false : true
_inRange(cond) =>
	bars = ta.barssince(cond == true)
	rangeLower <= bars and bars <= rangeUpper

//------------------------------------------------------------------------------
// Regular Bullish
// rsi: Higher Low

rsiHL = rsi[lookbackRight] > ta.valuewhen(plFound, rsi[lookbackRight], 1) and _inRange(plFound[1])

// Price: Lower Low

priceLL = low[lookbackRight] < ta.valuewhen(plFound, low[lookbackRight], 1)
bullCondAlert = priceLL and rsiHL and plFound
bullCond = showDivergence and bullCondAlert



plotshape(
	 bullCond ? rsi[lookbackRight] : na,
	 offset=-lookbackRight,
	 title="Regular Bullish Label",
	 text="D",
	 style=shape.labelup,
	 location=location.bottom,
	 color=bullColor,
	 textcolor=textColor
	 )

//------------------------------------------------------------------------------
// Regular Bearish
// rsi: Lower High

rsiLH = rsi[lookbackRight] < ta.valuewhen(phFound, rsi[lookbackRight], 1) and _inRange(phFound[1])

// Price: Higher High

priceHH = high[lookbackRight] > ta.valuewhen(phFound, high[lookbackRight], 1)

bearCondAlert = priceHH and rsiLH and phFound
bearCond = showDivergence and bearCondAlert



plotshape(
	 bearCond ? rsi[lookbackRight] : na,
	 offset=-lookbackRight,
	 title="Regular Bearish Label",
	 text=" D ",
	 style=shape.labeldown,
	 location=location.top,
	 color=bearColor,
	 textcolor=textColor
	 )