mirror of
https://github.com/mihakralj/QuanTAlib.git
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Miha Kralj
38 lines
1.1 KiB
Plaintext
38 lines
1.1 KiB
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("Detrended Price Oscillator (DPO)", "DPO", overlay=false)
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//@function Calculates Detrended Price Oscillator (DPO) by removing trend component from price
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//@param source Series to calculate DPO from
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//@param period Period for SMA calculation and displacement
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//@returns DPO value (current price - displaced SMA)
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dpo(series float source, simple int period) =>
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if period <= 0
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runtime.error("Period must be greater than 0")
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int displacement = math.floor(period / 2) + 1
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float sum = 0.0
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for i = 0 to period - 1
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sum += nz(source[i], source)
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float sma = sum / period
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float currentPrice = source
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float displacedSMA = sma[displacement]
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float result = na
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if not na(displacedSMA)
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result := currentPrice - displacedSMA
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result
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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_period = input.int(20, "Period", minval=1)
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// Calculation
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dpo_value = dpo(i_source, i_period)
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// Plot
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plot(dpo_value, "DPO", color=color.yellow, linewidth=2)
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hline(0, "Zero Line", color.gray, hline.style_dotted)
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