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//@version=5

// ----- BASE OF THE INDICATOR
indicator(title="[NBpkg] Indicator - Chaikin Money Flow with Areas", shorttitle="[NB]IND.CMF.WithAreas", format=format.price, precision=2, timeframe="", timeframe_gaps=true)
var cumVol = 0.
cumVol += nz(volume)
if barstate.islast and cumVol == 0
    runtime.error("No volume is provided by the data vendor.")
length = input.int(20, minval=1)
ad = close==high and close==low or high==low ? 0 : ((2*close-low-high)/(high-low))*volume
mf = math.sum(ad, length) / math.sum(volume, length)
plot(mf, color=color.yellow, title="CMF Style")


// ----- INCLUDING CRITICAL LINES

// ZERO LINE
hline(0, linestyle = hline.style_dotted,  linewidth = 1, color = color.white, editable = false)


// ----- BULLS LINES & FILL

lineLimitLong = input.float(defval = 0.05, step = 0.01, title = "Limit Line for Longs: 0.05 is recomended")
hline(lineLimitLong, linestyle = hline.style_dotted,  linewidth = 1, color = color.green, title = "Limit for Longs")

buyPreassureMin = input.float(defval = 0.25, step = 0.01, title = "Bull Area Min,: 0.25 is recomended")
buyPreassureMax = input.float(defval = 0.40, step = 0.01, title = "Bull Area Max: 0.40 is recomended")


fill(hline(buyPreassureMin, linestyle = hline.style_dotted,  linewidth = 1, color = color.lime, title = "BullAreaMin"), hline(buyPreassureMax, linestyle = hline.style_dotted,  linewidth = 1, color = color.lime, title = "Bull Area Max"), color.new(color.lime, transp = 80), title = "Bull Area Backround")

// ----- BEARS LINES & FILL

lineLimitShort = input.float(defval = -0.05, step = 0.01, title = "Limit Line for Shorts: -0.05 is recomended")
hline(lineLimitShort, linestyle = hline.style_dotted,  linewidth = 1, color = color.orange, title = "Limit for Bears")

sellingPreassureMin = input.float(defval = -0.25, step = 0.01, title = "Bear Area Min,: -0.25 is recomended")
sellingPreassureMax = input.float(defval = -0.40, step = 0.01, title = "Bear Area Max: -0.40 is recomended")

fill(hline(sellingPreassureMin, linestyle = hline.style_dotted,  linewidth = 1, color = color.red, title = "Bear Area Min"), hline(sellingPreassureMax, linestyle = hline.style_dotted,  linewidth = 1, color = color.red, title = "Bear Area Max"), color.new(color.red, transp = 80), title = "Bear Area Background")

// ----- ALERTS

float currentPrice = close

enterBullArea = ta.crossover(currentPrice, buyPreassureMin)
alertcondition(enterBullArea, title = "Price in Bull Area", message = "Price entered Bear Area")

leftBullArea = ta.crossunder(currentPrice, buyPreassureMin)
alertcondition(leftBullArea, title = "Price out of Bull Area", message = "Price has left the Bull Area")

enterBearArea = ta.crossunder(currentPrice, sellingPreassureMin)
alertcondition(enterBearArea, title = "Price in Bear Area", message = "Price entered Bear Area")

leftBearArea = ta.crossover(currentPrice, sellingPreassureMin)
alertcondition(leftBearArea, title = "Price out of Bear Area", message = "Price has left the Bear Area")