Volume Weighted Average Price

ndicator(title="Volume Weighted Average Price", shorttitle="VWAP", overlay=true, timeframe="", timeframe_gaps=true)

hideonDWM = input(false, title="Hide VWAP on 1D or Above", group="VWAP Settings", display = display.data_window)
var anchor = input.string(defval = "Session", title="Anchor Period",
options=["Session", "Week", "Month", "Quarter", "Year", "Decade", "Century", "Earnings", "Dividends", "Splits"], group="VWAP Settings")
src = input(title = "Source", defval = hlc3, group="VWAP Settings", display = display.data_window)
offset = input.int(0, title="Offset", group="VWAP Settings", minval=0, display = display.data_window)

BANDS_GROUP = "Bands Settings"
CALC_MODE_TOOLTIP = "Determines the units used to calculate the distance of the bands. When 'Percentage' is selected, a multiplier of 1 means 1%."
calcModeInput = input.string("Standard Deviation", "Bands Calculation Mode", options = ["Standard Deviation", "Percentage"], group = BANDS_GROUP, tooltip = CALC_MODE_TOOLTIP, display = display.data_window)
showBand_1 = input(true, title = "", group = BANDS_GROUP, inline = "band_1", display = display.data_window)
bandMult_1 = input.float(1.0, title = "Bands Multiplier #1", group = BANDS_GROUP, inline = "band_1", step = 0.5, minval=0, display = display.data_window, active = showBand_1)
showBand_2 = input(false, title = "", group = BANDS_GROUP, inline = "band_2", display = display.data_window)
bandMult_2 = input.float(2.0, title = "Bands Multiplier #2", group = BANDS_GROUP, inline = "band_2", step = 0.5, minval=0, display = display.data_window, active = showBand_2)
showBand_3 = input(false, title = "", group = BANDS_GROUP, inline = "band_3", display = display.data_window)
bandMult_3 = input.float(3.0, title = "Bands Multiplier #3", group = BANDS_GROUP, inline = "band_3", step = 0.5, minval=0, display = display.data_window, active = showBand_3)

cumVolume = ta.cum(volume)
if barstate.islast and cumVolume == 0
runtime.error("No volume is provided by the data vendor.")

isNewPeriod = switch anchor
"Earnings" =>
new_earnings_actual = request.earnings(syminfo.tickerid, earnings.actual, barmerge.gaps_on, barmerge.lookahead_on, ignore_invalid_symbol=true)
new_earnings_standardized = request.earnings(syminfo.tickerid, earnings.standardized, barmerge.gaps_on, barmerge.lookahead_on, ignore_invalid_symbol=true)
not na(new_earnings_actual) or not na(new_earnings_standardized)
"Dividends" =>
new_dividends = request.dividends(syminfo.tickerid, dividends.gross, barmerge.gaps_on, barmerge.lookahead_on, ignore_invalid_symbol=true)
not na(new_dividends)
"Splits" =>
new_split = request.splits(syminfo.tickerid, splits.denominator, barmerge.gaps_on, barmerge.lookahead_on, ignore_invalid_symbol=true)
not na(new_split)
"Session" => timeframe.change("D")
"Week" => timeframe.change("W")
"Month" => timeframe.change("M")
"Quarter" => timeframe.change("3M")
"Year" => timeframe.change("12M")
"Decade" => timeframe.change("12M") and year % 10 == 0
"Century" => timeframe.change("12M") and year % 100 == 0
=> false

isEsdAnchor = anchor == "Earnings" or anchor == "Dividends" or anchor == "Splits"
if na(src[1]) and not isEsdAnchor
isNewPeriod := true

float vwapValue = na
float upperBandValue1 = na
float lowerBandValue1 = na
float upperBandValue2 = na
float lowerBandValue2 = na
float upperBandValue3 = na
float lowerBandValue3 = na

if not (hideonDWM and timeframe.isdwm)
[_vwap, _stdevUpper, _] = ta.vwap(src, isNewPeriod, 1)
vwapValue := _vwap
stdevAbs = _stdevUpper - _vwap
bandBasis = calcModeInput == "Standard Deviation" ? stdevAbs : _vwap * 0.01
upperBandValue1 := _vwap + bandBasis * bandMult_1
lowerBandValue1 := _vwap - bandBasis * bandMult_1
upperBandValue2 := _vwap + bandBasis * bandMult_2
lowerBandValue2 := _vwap - bandBasis * bandMult_2
upperBandValue3 := _vwap + bandBasis * bandMult_3
lowerBandValue3 := _vwap - bandBasis * bandMult_3

plot(vwapValue, title = "VWAP", color = #2962FF, offset = offset)

displayBand1 = showBand_1 ? display.all : display.none
upperBand_1 = plot(upperBandValue1, title="Upper Band #1", color = color.green, offset = offset, display = displayBand1, editable = showBand_1)
lowerBand_1 = plot(lowerBandValue1, title="Lower Band #1", color = color.green, offset = offset, display = displayBand1, editable = showBand_1)
fill(upperBand_1, lowerBand_1, title="Bands Fill #1", color = color.new(color.green, 95), display = displayBand1, editable = showBand_1)

displayBand2 = showBand_2 ? display.all : display.none
upperBand_2 = plot(upperBandValue2, title="Upper Band #2", color = color.olive, offset = offset, display = displayBand2, editable = showBand_2)
lowerBand_2 = plot(lowerBandValue2, title="Lower Band #2", color = color.olive, offset = offset, display = displayBand2, editable = showBand_2)
fill(upperBand_2, lowerBand_2, title="Bands Fill #2", color = color.new(color.olive, 95), display = displayBand2, editable = showBand_2)

displayBand3 = showBand_3 ? display.all : display.none
upperBand_3 = plot(upperBandValue3, title="Upper Band #3", color = color.teal, offset = offset, display = displayBand3, editable = showBand_3)
lowerBand_3 = plot(lowerBandValue3, title="Lower Band #3", color = color.teal, offset = offset, display = displayBand3, editable = showBand_3)
fill(upperBand_3, lowerBand_3, title="Bands Fill #3", color = color.new(color.teal, 95), display = displayBand3, editable = showBand_3)