PineForge — Meridian DMI Regime

//@version=6
// SPDX-License-Identifier: Apache-2.0
// Copyright 2026 PineForge
// PineForge Corporate Strategy: Meridian DMI Regime
// Directional movement is admitted only inside a measured trend-strength regime.
strategy("PineForge — Meridian DMI Regime", overlay=true,
     initial_capital=100000,
     default_qty_type=strategy.fixed, default_qty_value=2,
     pyramiding=0, commission_type=strategy.commission.percent,
     commission_value=0.05, slippage=1,
     margin_long=100, margin_short=100,
     process_orders_on_close=false, calc_on_order_fills=false)

diLength = input.int(14, "DI Length", minval=2, group="Signal")
adxSmoothing = input.int(12, "ADX Smoothing", minval=2, group="Signal")
trendLength = input.int(48, "Trend EMA", minval=5, group="Signal")
entryStrength = input.float(19.0, "Entry ADX", minval=5, maxval=60, step=0.5, group="Signal")
exitStrength = input.float(14.0, "Exit ADX", minval=5, maxval=50, step=0.5, group="Signal")
atrLength = input.int(18, "ATR Length", minval=2, group="Risk")
stopAtr = input.float(2.2, "Stop ATR", minval=0.5, step=0.1, group="Risk")

[positiveDi, negativeDi, adxValue] = ta.dmi(diLength, adxSmoothing)
trend = ta.ema(close, trendLength)
atrValue = ta.atr(atrLength)

entrySignal = ta.crossover(positiveDi, negativeDi) and adxValue > entryStrength and close > trend
exitSignal = ta.crossunder(positiveDi, negativeDi) or adxValue < exitStrength or close < trend

if entrySignal
    strategy.entry("Meridian Long", strategy.long)

if strategy.position_size > 0 and exitSignal
    strategy.close("Meridian Long", comment="Directional regime ended")

if strategy.position_size > 0
    strategy.exit("Meridian Guard", from_entry="Meridian Long",
         stop=strategy.position_avg_price - atrValue * stopAtr)

plot(trend, "Trend EMA", color=color.orange)
plot(adxValue, "ADX", color=color.purple, display=display.data_window)