Pipsgrowth EX18039 TrendFollow

Pipsgrowth EX18039 TrendFollow is a Hull Moving Average slope-reversal EA designed to buy the first bar of a fresh HMA turn and sell the first bar of a fresh HMA turn-down on XAUUSD M5. The HMA is computed inline in the CalcHMA() function from WMA primitives (no iCustom, no .mqh, no external indicator): it builds raw[i] = 2*WMA(period/2) - WMA(period) for sqrt(period)+1 bars, then WMA-weights the raw series so the newest bar carries the highest weight. With InpHMAPeriod = 21 the half-window is 10, the full window is 21, and the smoothing window is 4 — the standard Hull recipe. The signal function HmaSignal() evaluates slope_now = h1 - h2 and slope_prev = h2 - h3 on the last closed bar (shift 1) and emits a buy only when slope_prev <= 0 and slope_now > 0, or a sell in the mirror case. That is a strict zero-crossing of the HMA slope, not a price-pullback pattern. A confidence score is derived from |slope| / h1 * 1000 * 50 + 25, capped at 100, and TryEntry() rejects any signal with confidence below 30.

Entries are gated by a higher-timeframe trend agreement check. HTFTrendDir() pulls an EMA(50) on the selected HTF (InpHTFTrendTF = 8 maps through the MapTimeframeInt() switch, which falls back to PERIOD_H1 for any value outside 1..7, so the effective HTF is H1) and returns +1 only if the H1 close is above the EMA and the EMA is rising, or -1 only if the close is below and the EMA is falling. A long HMA turn with an H1 downtrend is dropped, and the no-trade reason is logged as "HTF trend disagrees". An R/R floor of 1.0 is also enforced — if InpATRSLmult / InpATRTPmult drops below 1, the EA refuses to send.

The regime classifier ClassifyRegime() runs on every tick and reads 50 bars of ATR(14), 3 bars of ADX(14) main, and 30 bars of Bollinger Bands(20, 2.0) width. It returns one of six states: REG_STRONG_TREND (ADX >= 22 and ATR-percentile > 0.6), REG_WEAK_TREND (ADX >= 18 and ATR-percentile > 0.4), REG_COMPRESS (current BB-width < prior 30-bar width * 0.75 and ATR-percentile < 0.35), REG_EXPAND (current BB-width > prior width * 1.35 and ATR-percentile > 0.55), REG_CHOPPY (ADX < 15 or ATR-percentile < 0.20), and REG_RANGE as the residual. The choppy state is the only one that hard-blocks entries in CanTradeNew(). All other regimes are valid trading contexts; the compress and expand states let the EA act on volatility squeezes and bursts without forcing a flat book.

Risk is sized off an effective-capital pool. UpdateEffectiveCapital() reads account equity and, if InpCapitalCapAmount > 0, caps it at that input, otherwise uses full equity. CalcLot() converts the ATR-based SL distance into lots via tick_value / tick_size, applying ClampVolume() to the broker's lot step and min/max. With InpRiskPercent = 0.5 the EA targets 0.5% of effective capital at risk per trade, InpDailyLossLimitPercent = 3.0 enforces a 3% realized-loss daily circuit-breaker (scanned from deal history filtered by DEAL_MAGIC), and InpCapitalCapFloor = 50 blocks any entries below that equity floor. The cooldown logic in OnTradeTransaction() watches for three consecutive losing DEAL_ENTRY_OUT events and engages a 4-hour lockout (g_cooldown_until = TimeCurrent() + 4*3600) before resetting the counter. With InpMaxConcurrent = 3 the EA caps the open-position count to 3.

Position management is layered. ManagePositions() runs once per tick before any new entry attempt. At InpBreakEvenR = 1.0 the stop is ratcheted to the open price once price has travelled 1R in profit, enforced through EnforceStopsDistance() which respects the broker's SYMBOL_TRADE_STOPS_LEVEL. At the same 1R trigger, 50% of the position is closed via TryClosePartial_EX18039(), gated so that the remaining volume still exceeds 1.5 * LotsMin. The 2.5*ATR trailing stop (Chandelier style) advances the stop forward only — never backwards — and re-uses EnforceStopsDistance to keep the broker happy. Exits are wired to three events: an opposite HMA turn calls TryClose_EX18039(), a regime shift into CHOPPY with r_dist <= 0 calls the same close helper (so choppy collapses underwater), and a 200-bar time-based exit kicks in if a trade has been open longer than InpMaxBarsInTrade. Each close/modify attempt gets up to three retries with 200ms (close) or 100ms (modify) sleeps on REQUOTE, TIMEOUT, PRICE_OFF, or PRICE_CHANGED retcodes.

Execution safety is non-trivial. SendMarket() calls OrderCalcMargin() before any trade send, refuses if margin_req > free_margin, and runs a 2-attempt retry loop on requote/timeout/price-off/price-changed retcodes. With InpDryRun = true the default, every order is logged via PrintFormat with the [DRYRUN] prefix instead of being sent to the broker, so the EA can be paper-traded end-to-end on a live account. SetTypeFillingBySymbol() auto-detects FOK / IOC / Return per symbol. The spread gate in SpreadOK() rejects entries when the live spread exceeds SYMBOL_SPREAD * 3 + 10 points, and SessionOK() blocks weekends plus the 21:00–07:00 server-time band. There is no news feed wired — the EA is session-, spread-, and regime-gated, not event-gated.

On the test side, OnTester() returns (STAT_PROFIT * STAT_PROFIT_FACTOR) / (1 + STAT_EQUITY_DD), with a 30-trade floor and the equity-DD floored at 1.0 to avoid a divide-by-zero. The function is named explicitly so optimizer passes can be sorted by this composite score rather than raw net profit. In live use, the EA trades HMA slope reversals filtered by H1 trend agreement, with a six-state regime classifier, 1:1.5 R:R, ATR-Chandelier trail, partial take-profit at 1R, and a 200-bar time cap. A user who wants only the highest-conviction trades can raise InpHMAPeriod to 28 or 34 (slower turns) and lift the confidence floor in the source from 30 to 45, which will mechanically cut the trade count and concentrate entries on stronger HMA hooks.