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So, here's what I'm aiming to do: I want to write a script that uses OHLC-data exclusively from UP-candles [close > open] to calculate % change from Open to High, Close to High, and Open to Low, then take a (moving) average of those values to determine dynamic take profit-, trailing deviation- and stop loss-levels. I figured that this should do the trick.

// Variables
upCandle = (close > open) and barstate.isconfirmed

MP = if upCandle
    ((high - open) / open) * 100

TD = if upCandle
    ((high - close) / close) * 100

ML = if upCandle
    ((low - open) / open) * 100

It gets the values of the Up-candles correctly (so that part works), but then it interpolates between the empty values it gets from Down-candles. I want to ONLY take the OHLC-data from Up-candles, not have N/A- or ZERO-values inserted if no data is available. I think I might be able to solve this using arrays, something along the lines of "if the Up-candle is confirmed, stick the appropriate value into a corresponding FIFO-array, if not then don't". Then, I could calculate the average from that array with a specified lookback period (f.x. include only the last 9 Up-candles) which I could then plot as a moving average for the array-data and a histogram for the raw Up-candle data. In other words, I think I can accomplish what I want to do by filtering out Down-candles from an array.

But how do I do that? Anyone have any ideas? :)

Daniel Bauer
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1 Answers1

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You can indeed use the arrays to accomplish the goal. Add an array element only if the current candle is the one you are looking for - upCandle, using the input you can control the number of elements in the array and take its average using the array.avg() built-in. I have also introduced the upCandleCount counter for the plot() functions to start plotting on the chart only after 9 upCandles are found.

//@version=5
indicator("My script")

// Variables
upCandle = (close > open) and barstate.isconfirmed

MP = if upCandle
    ((high - open) / open) * 100

TD = if upCandle
    ((high - close) / close) * 100

ML = if upCandle
    ((low - open) / open) * 100

// Average of the given values for the latest 9 upCandles
avgPeriod = input.int(9, 'Average Period')

var float[] upCandleMPs = array.new<float>(avgPeriod)
var float[] upCandleTDs = array.new<float>(avgPeriod)
var float[] upCandleMLs = array.new<float>(avgPeriod)

var int upCandleCount = 0

if upCandle
    array.unshift(upCandleMPs, MP)
    array.unshift(upCandleTDs, TD)
    array.unshift(upCandleMLs, ML)
    upCandleCount += 1

plot(upCandleCount >= avgPeriod ? array.avg(upCandleMPs) : na)
plot(upCandleCount >= avgPeriod ? array.avg(upCandleTDs) : na)
plot(upCandleCount >= avgPeriod ? array.avg(upCandleMLs) : na)
e2e4
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  • Hey e2e4 - thanks so much for taking the time to help with this. This got me on the right track, specifically adding the "if upCandle"-condition before the array-operations. I've now solved it like this (only displayed for MP, for brevity): upCandle = (close > open) and barstate.isconfirmed MP = if upCandle ((high - open) / open) * 100 lookback = input.int(title = "Lookback", defval = 9) var MPArray = array.new(lookback) if upCandle array.shift(MPArray) if upCandle array.push(MPArray, MP) averageMP = array.avg(MPArray) plot(averageMP) Thank you! – Daniel Bauer Apr 08 '22 at 10:28