ADX Trend Filter Pro

// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © RehanFX_Alpha | MUHAMMAD REHAN AFZAL
//@version=6
indicator("ADX Trend Filter Pro [Alpha Edition]", shorttitle="ADX Pro [Alpha]")

// ═══════════════════════════════════════════════════════
//  ADX TREND FILTER PRO — Alpha EDITION
//  Enhancements:
//    • Customizable ADX/EMA inputs
//    • Trend Strength levels (Weak/Moderate/Strong/Very Strong)
//    • ADX Divergence detection
//    • Trend Weakening alert
//    • Full info table with actual values
//    • Gradient histogram colors
//    • Signal quality filter
// ═══════════════════════════════════════════════════════

// ─── INPUTS ─────────────────────────────────────────────

grp_adx = "📐 ADX Settings"
adx_len      = input.int(14,  "ADX Length",          group=grp_adx)
adx_smooth   = input.int(14,  "ADX Smoothing",       group=grp_adx)
adx_weak     = input.int(20,  "Weak Threshold",      group=grp_adx)
adx_mod      = input.int(30,  "Moderate Threshold",  group=grp_adx)
adx_strong   = input.int(40,  "Strong Threshold",    group=grp_adx)

grp_ema = "📈 EMA Settings"
ema_fast_len = input.int(12, "Fast EMA", group=grp_ema)
ema_slow_len = input.int(50, "Slow EMA", group=grp_ema)

grp_sig = "🎯 Signal Settings"
only_strong  = input.bool(false, "Only Strong Trend Signals (ADX > Moderate)", group=grp_sig)
show_div     = input.bool(true,  "Show Divergence Warning",                     group=grp_sig)

grp_disp = "🖥️ Display"
txtcol       = input.color(color.gray, "Text Color",  group=grp_disp)
show_table   = input.bool(true,  "Show Info Table",   group=grp_disp)
show_signals = input.bool(true,  "Show Buy/Sell Signals", group=grp_disp)

// ─── CORE CALCS ──────────────────────────────────────────

[di_plus, di_minus, adx] = ta.dmi(adx_len, adx_smooth)
ema_fast = ta.ema(close, ema_fast_len)
ema_slow = ta.ema(close, ema_slow_len)

// ─── TREND STRENGTH ──────────────────────────────────────

strength_txt = adx >= adx_strong ? "VERY STRONG 🔥" :
               adx >= adx_mod    ? "STRONG 💪"      :
               adx >= adx_weak   ? "MODERATE ⚡"    : "WEAK 😴"

strength_col = adx >= adx_strong ? color.rgb(255, 50,  50)  :
               adx >= adx_mod    ? color.rgb(255, 140, 0)   :
               adx >= adx_weak   ? color.rgb(255, 220, 0)   :
                                   color.rgb(120, 120, 120)

// ─── DIRECTION ───────────────────────────────────────────

bull_bias  = di_plus  > di_minus
bear_bias  = di_minus > di_plus
is_ranging = adx < adx_weak

// ─── EMA TREND ───────────────────────────────────────────

ema_bull  = ema_fast > ema_slow
ema_bear  = ema_fast < ema_slow
ema_color = ema_bull ? color.rgb(79, 163, 81) : color.rgb(77, 23, 28)

// ─── ADX DIVERGENCE ──────────────────────────────────────
// Price making higher highs but ADX falling = weak trend

price_hh  = high > high[1] and high[1] > high[2]
adx_fall  = adx  < adx[1]  and adx[1]  < adx[2]
price_ll  = low  < low[1]  and low[1]  < low[2]
adx_rise  = adx  > adx[1]  and adx[1]  > adx[2]

bull_div  = price_hh and adx_fall and bull_bias   // price up, ADX down = weakening bull
bear_div  = price_ll  and adx_fall and bear_bias  // price down, ADX down = weakening bear

// ─── SIGNAL QUALITY FILTER ───────────────────────────────

signal_ok = only_strong ? adx >= adx_mod : adx >= adx_weak

buy_signal  = ta.crossover(di_plus, di_minus)  and bull_bias and signal_ok
sell_signal = ta.crossunder(di_plus, di_minus) and bear_bias and signal_ok

// ─── GRADIENT HISTOGRAM ──────────────────────────────────
// Stronger ADX = more saturated color

bull_intensity = math.min(adx / adx_strong, 1.0)
bear_intensity = math.min(adx / adx_strong, 1.0)

bull_col = color.from_gradient(bull_intensity, 0, 1, color.rgb(100, 200, 100), color.rgb(0, 120, 0))
bear_col = color.from_gradient(bear_intensity, 0, 1, color.rgb(200, 100, 100), color.rgb(140, 0, 0))

// ─── PLOTS ───────────────────────────────────────────────

// ADX area background
plot(adx, "ADX", style=plot.style_area, color=color.new(color.red, 70))

// DI+ / DI- histogram with gradient
plot(di_plus,  "DI+", color=bull_bias ? bull_col : color.new(color.green, 60), style=plot.style_columns)
plot(di_minus, "DI-", color=bear_bias ? bear_col : color.new(color.red,   60), style=plot.style_columns)

// MA Band at threshold level
plot(adx_weak, title="MA BAND", style=plot.style_area, color=ema_color)

// ADX line on top
plot(adx, "ADX Line", color=strength_col, linewidth=2)

// ─── BAR COLOR ───────────────────────────────────────────

barcolor(bull_bias and adx > adx_weak ? color.rgb(4, 104, 1)   :
         bear_bias and adx > adx_weak ? color.rgb(163, 2, 2)   :
         color.rgb(247, 222, 4))

// ─── SIGNALS ─────────────────────────────────────────────

if show_signals
    if buy_signal
        label.new(bar_index, di_minus - 2, "▲ BUY",
             style=label.style_label_up,
             color=color.new(color.green, 10),
             textcolor=color.white,
             size=size.tiny)
    if sell_signal
        label.new(bar_index, di_plus + 2, "▼ SELL",
             style=label.style_label_down,
             color=color.new(color.red, 10),
             textcolor=color.white,
             size=size.tiny)

// ─── DIVERGENCE WARNING ──────────────────────────────────

if show_div
    if bull_div
        label.new(bar_index, adx + 3, "⚠ DIV",
             style=label.style_label_down,
             color=color.new(color.orange, 20),
             textcolor=color.white,
             size=size.tiny)
    if bear_div
        label.new(bar_index, adx + 3, "⚠ DIV",
             style=label.style_label_down,
             color=color.new(color.orange, 20),
             textcolor=color.white,
             size=size.tiny)

// ─── ALERTS ──────────────────────────────────────────────

alertcondition(buy_signal,                    "▲ ADX Buy Signal",      "ADX Buy — DI+ crossed above DI-")
alertcondition(sell_signal,                   "▼ ADX Sell Signal",     "ADX Sell — DI- crossed above DI+")
alertcondition(adx >= adx_strong,             "🔥 Very Strong Trend",  "ADX Very Strong — momentum building")
alertcondition(adx < adx_weak and adx[1] >= adx_weak, "😴 Trend Weakening", "ADX dropped below threshold — ranging market")
alertcondition(bull_div,                      "⚠ Bull Divergence",     "Price HH but ADX falling — bull trend weakening")
alertcondition(bear_div,                      "⚠ Bear Divergence",     "Price LL but ADX falling — bear trend weakening")
alertcondition(ema_bull and not ema_bull[1],  "EMA Bullish Cross",     "EMA Fast crossed above Slow")
alertcondition(ema_bear and not ema_bear[1],  "EMA Bearish Cross",     "EMA Fast crossed below Slow")

// ─── INFO TABLE ──────────────────────────────────────────

if show_table and barstate.islast
    var table t = table.new(position.top_right, 3, 8,
         bgcolor=color.new(color.black, 20),
         border_color=color.new(color.gray, 50),
         border_width=1)

    // Header
    table.cell(t, 0, 0, "ADX PRO [TCO]", bgcolor=color.new(color.navy, 10), text_color=color.white, text_size=size.small)
    table.cell(t, 1, 0, "VALUE",         bgcolor=color.new(color.navy, 10), text_color=color.white, text_size=size.small)
    table.cell(t, 2, 0, "STATUS",        bgcolor=color.new(color.navy, 10), text_color=color.white, text_size=size.small)

    // Candle
    candle_col = close > open ? color.new(color.green, 30) : color.new(color.red, 30)
    candle_txt = close > open ? "Bullish 🟢" : "Bearish 🔴"
    table.cell(t, 0, 1, "Candle",    bgcolor=color.new(color.gray, 60), text_color=txtcol,      text_size=size.tiny)
    table.cell(t, 1, 1, candle_txt,  bgcolor=candle_col,                text_color=color.white, text_size=size.tiny)
    table.cell(t, 2, 1, str.tostring(math.round(close, 2)), bgcolor=candle_col, text_color=color.white, text_size=size.tiny)

    // ADX Value
    table.cell(t, 0, 2, "ADX",                               bgcolor=color.new(color.gray, 60), text_color=txtcol,      text_size=size.tiny)
    table.cell(t, 1, 2, str.tostring(math.round(adx, 1)),    bgcolor=strength_col,               text_color=color.white, text_size=size.tiny)
    table.cell(t, 2, 2, strength_txt,                         bgcolor=strength_col,               text_color=color.white, text_size=size.tiny)

    // DI Direction
    adxdir_col = bull_bias ? color.new(color.green, 30) : color.new(color.red, 30)
    adxdir_txt = bull_bias ? "DI+ ▲ Bull" : "DI- ▼ Bear"
    bars_since = ta.barssince(ta.cross(di_plus, di_minus))
    table.cell(t, 0, 3, "Direction",  bgcolor=color.new(color.gray, 60), text_color=txtcol,      text_size=size.tiny)
    table.cell(t, 1, 3, adxdir_txt,   bgcolor=adxdir_col,                text_color=color.white, text_size=size.tiny)
    table.cell(t, 2, 3, str.tostring(bars_since) + " bars ago", bgcolor=adxdir_col, text_color=color.white, text_size=size.tiny)

    // DI Values
    table.cell(t, 0, 4, "DI+ / DI-",                                                   bgcolor=color.new(color.gray, 60), text_color=txtcol,      text_size=size.tiny)
    table.cell(t, 1, 4, str.tostring(math.round(di_plus,  1)),                          bgcolor=color.new(color.green, 40), text_color=color.white, text_size=size.tiny)
    table.cell(t, 2, 4, str.tostring(math.round(di_minus, 1)),                          bgcolor=color.new(color.red,   40), text_color=color.white, text_size=size.tiny)

    // EMA Trend
    ema_col = ema_bull ? color.new(color.green, 30) : color.new(color.red, 30)
    ema_txt = ema_bull ? "Bullish 📈" : "Bearish 📉"
    table.cell(t, 0, 5, "EMA Trend", bgcolor=color.new(color.gray, 60), text_color=txtcol,      text_size=size.tiny)
    table.cell(t, 1, 5, ema_txt,     bgcolor=ema_col,                   text_color=color.white, text_size=size.tiny)
    table.cell(t, 2, 5, str.tostring(ema_fast_len) + "/" + str.tostring(ema_slow_len), bgcolor=ema_col, text_color=color.white, text_size=size.tiny)

    // Market Mode
    mode_txt = is_ranging ? "RANGING ↔" : bull_bias ? "TRENDING ▲" : "TRENDING ▼"
    mode_col = is_ranging ? color.new(color.orange, 30) : bull_bias ? color.new(color.green, 30) : color.new(color.red, 30)
    table.cell(t, 0, 6, "Market",  bgcolor=color.new(color.gray, 60), text_color=txtcol,      text_size=size.tiny)
    table.cell(t, 1, 6, mode_txt,  bgcolor=mode_col,                  text_color=color.white, text_size=size.small)
    table.cell(t, 2, 6, is_ranging ? "No Trade ⛔" : "Trade OK ✅", bgcolor=mode_col, text_color=color.white, text_size=size.tiny)

    // Divergence
    div_txt = bull_div ? "Bull DIV ⚠" : bear_div ? "Bear DIV ⚠" : "None ✅"
    div_col = (bull_div or bear_div) ? color.new(color.orange, 20) : color.new(color.gray, 55)
    table.cell(t, 0, 7, "Divergence", bgcolor=color.new(color.gray, 60), text_color=txtcol,      text_size=size.tiny)
    table.cell(t, 1, 7, div_txt,      bgcolor=div_col,                   text_color=color.white, text_size=size.tiny)
    table.cell(t, 2, 7, (bull_div or bear_div) ? "Caution!" : "Clean",  bgcolor=div_col, text_color=color.white, text_size=size.tiny)