mirror of
https://github.com/mihakralj/QuanTAlib.git
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Miha Kralj
59 lines
2.2 KiB
Plaintext
59 lines
2.2 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("TTM Trend", "TTM_TREND", overlay=true)
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//@function Calculates TTM Trend using 6-period moving average with color-coded trend
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//@param source Series to calculate TTM Trend from
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//@param period Lookback period for moving average
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//@returns Tuple [ttm_line, trend, strength] where trend is -1/0/1 and strength is percentage change
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ttm_trend(series float source, simple int period = 6) =>
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if period <= 0
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runtime.error("Period must be greater than 0")
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float alpha = 2.0 / (period + 1)
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var float ema = source
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var float ema_prev = source
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ema := alpha * (source - ema) + ema
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float trend = math.sign(ema - ema_prev)
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float strength = math.abs(ema - ema_prev) / math.max(ema_prev, 1e-10) * 100
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ema_prev := ema
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[ema, trend, strength]
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// ---------- Main loop ----------
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// Inputs
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i_period = input.int(6, "Period", minval=1)
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i_source = input.source(hlc3, "Source")
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i_show_strength = input.bool(true, "Show Trend Strength %")
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// Calculation
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[ttm_line, trend, strength] = ttm_trend(i_source, i_period)
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// Colors
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color up_color = color.new(color.green, 0)
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color down_color = color.new(color.red, 0)
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color neutral_color = color.new(color.gray, 50)
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color line_color = trend > 0 ? up_color : trend < 0 ? down_color : neutral_color
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// Plot
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plot(ttm_line, "TTM Trend", color=line_color, linewidth=3, style=plot.style_line)
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// Strength band (optional)
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float strength_multiplier = 0.01
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float upper_band = i_show_strength ? ttm_line + (ttm_line * strength * strength_multiplier) : na
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float lower_band = i_show_strength ? ttm_line - (ttm_line * strength * strength_multiplier) : na
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p1 = plot(upper_band, "Upper Strength", color=color.new(color.blue, 80), linewidth=1)
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p2 = plot(lower_band, "Lower Strength", color=color.new(color.blue, 80), linewidth=1)
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fill(p1, p2, color=color.new(color.blue, 90), title="Strength Band")
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// Optional: Plot trend change signals
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bool trend_change = trend != nz(trend[1], 0) and bar_index > 0
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plotshape(trend_change and trend > 0, "Up", shape.triangleup, location.belowbar, color=up_color, size=size.tiny)
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plotshape(trend_change and trend < 0, "Down", shape.triangledown, location.abovebar, color=down_color, size=size.tiny)
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