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https://github.com/mihakralj/QuanTAlib.git
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Miha Kralj
31 lines
871 B
Plaintext
31 lines
871 B
Plaintext
// Licensed under the Apache License, Version 2.0
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// © mihakralj
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//@version=6
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indicator("Rate of Change (ROC)", "ROC", overlay=false)
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//@function Calculates absolute Rate of Change between current price and N periods ago
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//@param source Source price series
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//@param length Lookback period
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//@returns Absolute price change value
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roc(series float source, simple int length)=>
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if length<=0
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runtime.error("Length must be greater than 0")
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var int count = 0
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float change = na
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if not na(source[count])
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change := source - source[count]
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count := math.min(count + 1, length)
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change
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// ---------- Main loop ----------
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// Inputs
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i_source = input.source(close, "Source")
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i_length = input.int(9, "Length", minval=1)
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// Calculate ROC
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float roc_val = roc(i_source, i_length)
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// Plot
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plot(roc_val, "ROC", color=color.yellow, linewidth=2)
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