mirror of
https://github.com/mihakralj/QuanTAlib.git
synced 2026-07-27 17:27:43 +00:00
Miha Kralj
42 lines
1.8 KiB
Plaintext
42 lines
1.8 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("Average Directional Movement Index (ADX)", "ADX", overlay=false)
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//@function Calculates ADX using Wilder's smoothing with compensated RMA
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//@param period Number of bars used in the calculation
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//@returns tuple of ADX value, +DI, -DI
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adx(simple int period = 14) =>
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if period <= 0
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runtime.error("Period must be greater than 0")
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float tr = na(close[1]) ? high - low : math.max(high - low, math.max(math.abs(high - close[1]), math.abs(low - close[1])))
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float plus_dm = na(high[1]) ? 0.0 : high - high[1] > low[1] - low and high - high[1] > 0 ? high - high[1] : 0.0
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float minus_dm = na(low[1]) ? 0.0 : low[1] - low > high - high[1] and low[1] - low > 0 ? low[1] - low : 0.0
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var float tr_sum = 0.0
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var float plus_dm_sum = 0.0
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var float minus_dm_sum = 0.0
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tr_sum := nz(tr_sum) - nz(tr_sum[period]) + tr
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plus_dm_sum := nz(plus_dm_sum) - nz(plus_dm_sum[period]) + plus_dm
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minus_dm_sum := nz(minus_dm_sum) - nz(minus_dm_sum[period]) + minus_dm
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float plus_di = tr_sum != 0.0 ? math.min(100 * plus_dm_sum / tr_sum, 50.0) : 0.0
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float minus_di = tr_sum != 0.0 ? math.min(100 * minus_dm_sum / tr_sum, 50.0) : 0.0
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float dx = plus_di + minus_di != 0.0 ? 100 * math.abs(plus_di - minus_di) / (plus_di + minus_di) : 0.0
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var float dx_sum = 0.0
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dx_sum := nz(dx_sum) - nz(dx_sum[period]) + dx
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float adx_value = dx_sum / period
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[adx_value, plus_di, minus_di]
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// Inputs
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i_period = input.int(14, "Period", minval=1, tooltip="Number of bars used in the calculation")
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// Calculate ADX
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[adx_value, plus_di, minus_di] = adx(i_period)
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// Plot
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plot(adx_value, "ADX", color=color.yellow, linewidth=2)
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plot(plus_di, "+DI", color=color.yellow, linewidth=2)
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plot(minus_di, "-DI", color=color.yellow, linewidth=2)
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