EA_with_Python/docs/MyProject/HIT-EA_spec_en.md

HIT-EA Specification (English)

1. Overview

• This EA sends confirmed H4 OHLC data to an external Python process for market-state analysis and confirmed H1 OHLC data for entry candidate generation.
• The MQL5 side reads Python output files and places pending orders only after checking the H4 market state, H1 candidate prices, M15 confirmation filter, spread, and broker distance constraints.
• For backtest reproducibility, OHLC export uses OHLC_START_SHIFT = 1, so the forming bar is excluded and only closed bars are passed to Python.
• For live resilience, the EA tracks external-process running files, process IDs, exit codes, and timeouts to prevent duplicate launches and CSV overwrites.

2. Indicators

• No standard or custom indicators are used.
• OHLC data is retrieved with CopyRates(_Symbol, timeframe, OHLC_START_SHIFT, HISTORY_BARS, rates).
• M15 entry confirmation uses candle shape, average range, and distance to the candidate price for T2/T4. For T1/T3 it uses M15 impulse confirmation when that option is enabled.

3. Parameters

input

• lot_size = 0.01: Order volume.
• spread_limit = 60: Maximum allowed spread in points.
• magic_number = 10001: Magic number used to identify this EA's orders and positions.
• initial_order = 0: Enables initial H4/H1 processing on startup when set to 1.
• input_position_limit = 10: Practical limit for this EA's pending orders plus positions. Values above the internal POSITION_LIMIT are clamped.
• use_split_entry_zone = false: Enables split entries based on H1 predicted zones.
• split_entry_count = 3: Number of split entry orders, clamped to 1..10.
• split_lot_mode = SPLIT_LOT_TOTAL: Split lot mode. SPLIT_LOT_TOTAL divides the total lot across slots, and SPLIT_LOT_FIXED uses a fixed lot per order.
• split_total_lot_size = 0.09: Total lot used by total-split mode.
• split_fixed_lot_size = 0.01: Per-order lot used by fixed-split mode.
• cancel_old_split_pending_on_new_zone = true: Cancels older split pending orders when a new H1 zone set is loaded.
• use_m15_entry_filter = true: Enables M15 closed-bar entry timing confirmation.
• m15_entry_zone_atr_multiplier = 1.50: Allowed proximity multiplier based on the M15 average range.
• use_m15_imbalance_confirmation = true: Adds M15 impulse confirmation for T1/T3 trend-following candidates.
• m15_imbalance_avg_body_period = 20: Average-body period used by M15 impulse confirmation.
• m15_imbalance_sensitivity = 2.0: Required multiple of the average body for M15 impulse confirmation.
• m15_imbalance_min_avg_body_points = 1.0: Minimum M15 average body in points.
• use_m15_imbalance_debug_log = false: Enables detailed M15 impulse-confirmation logs.
• input_entry_max_candidate_age_minutes = 120: Maximum age, in minutes, for using an H1 candidate for new execution. This blocks delayed entries when M15 confirmation appears too late.
• input_sltp_manager_enabled = false: Enables UI-driven existing-position SL management through CSLTPManager.
• input_sltp_show_panel = true: Shows the SLTP control panel on the chart.
• input_sltp_use_breakeven = false: Enables normal break-even.
• input_sltp_breakeven_trigger_pips = 30.0: Profit threshold for normal break-even.
• input_sltp_breakeven_buffer_pips = 3.0: Profit-side entry buffer used by normal break-even.
• input_sltp_use_elapsed_breakeven = false: Enables elapsed-time break-even.
• input_sltp_elapsed_breakeven_hours = 4.0: Holding time required before elapsed-time break-even is allowed.
• input_sltp_elapsed_breakeven_buffer_pips = 3.0: Profit-side entry buffer used by elapsed-time break-even.
• input_sltp_use_active_trailing = false: Enables active step trailing.
• input_sltp_active_breakeven_pips = 30.0: Profit threshold that starts active trailing.
• input_sltp_active_stop_loss_offset_pips = 5.0: Initial locked profit offset from entry.
• input_sltp_active_step_trigger_pips = 10.0: Additional profit interval required for each SL step.
• input_sltp_active_step_move_pips = 5.0: SL movement added per completed step.
• input_sltp_use_tp_progress_stop = false: Enables TP-progress-based SL locking.
• input_sltp_tp_progress_trigger_percent = 70.0: TP progress required before the SL lock is applied.
• input_sltp_tp_progress_sl_lock_percent = 30.0: Entry-to-TP distance percentage locked by SL.
• input_sltp_use_high_volatility_limit = false: Enables short-term high-volatility SL tightening.

Main Constants

• POSITION_LIMIT = 48: Maximum number of this EA's pending orders plus positions.
• ENTRY_H1_LIMIT = 2: Pending-order lifetime in H1 bars.
• CLOSE_H1_LIMIT = 12: Position lifetime in H1 bars.
• HISTORY_BARS = 72: Number of OHLC bars exported to Python.
• OHLC_START_SHIFT = 1: Shift used to export closed bars only.
• M15_CONFIRM_BARS = 30: Number of M15 bars used for average-range calculation.
• ENTRY_RETRY_SECONDS = 60: Retry interval for entry checks.
• ENTRY_RETRY_LIMIT = 10: Maximum retry count for one H1 candidate set.
• TARGET_SIZE = 13: Number of numeric values expected in target_prices.txt.
• TARGET_ZONE_SCHEMA_VERSION = 2: Schema version used by target_zones.txt.
• PYTHON_TIMEOUT_SECONDS = 600: External Python wait threshold.

Python Entry-Candidate Guard

• After H1 candidate generation, Python invalidates any entry that is too far from the current price.
• The maximum distance is strategy-specific: T1/T3 Stop candidates use max(H1 EATR * 1.50, 5.00), and T2/T4 Limit candidates use max(H1 EATR * 1.00, 5.00). A strategy beyond its limit is rewritten to 0.00,0.00,0.00.
• This post-filter is intended to reduce delayed entries from deep limit orders or distant breakout waits after M15 confirmation arrives late.

4. File Layout

• Experts/MyProject/HIT-EA_refactor_ver6.mq5: EA entry point. Keeps OnInit, OnDeinit, OnTick, inputs, global state, and DLL imports.
• Include/MyLib/Common/HITRuntimeController.mqh: Tick flow, H4/H1/M15 update control, status comments, and spread checks.
• Include/MyLib/Signals/HITEntrySignal.mqh: Entry preconditions, order-type price validation, M15 filter, and retry-state updates.
• Include/MyLib/Common/HITExternalProcess.mqh: done/running files, external process handles, PID recovery, exit-code checks, and timeout recovery.
• Include/MyLib/Signals/HITPythonSignalGateway.mqh: OHLC CSV export, Python batch launch, and trend_state.txt / target_prices.txt / target_zones.txt loading.
• Include/MyLib/Trading/HITTradeManager.mqh: Order sending, filling policy, pending-order expiration, order/position counting, expired order cancellation, and expired position closing.
• Include/MyLib/Trading/SLTPManager.mqh: Existing-position break-even, elapsed-time break-even, active trailing, TP-progress SL, and high-volatility SL management.
• Include/MyLib/Panel/SLTPManagerPanel.mqh: Chart panel that toggles CSLTPManager features, validates numeric inputs, and applies settings to the EA.

5. Python Integration Files

During OnInit(), the EA builds a HIT_<sanitized symbol>_<magic_number> prefix from _Symbol and magic_number, then applies it to all MT5 Files linkage names. Example: HIT_GOLD_10001_ohlc_H4.csv. The same prefix is passed to the batch file as the first argument, and the batch file exposes it to Python as MT5_EA_FILE_PREFIX.

When no prefix is provided, such as manual Python execution, Python keeps using the legacy names like ohlc_H4.csv.

H4 Trend Analysis

• MQL5 output: <prefix>_ohlc_H4.csv
• Python output: <prefix>_trend_state.txt
• Done marker: <prefix>_process_done_trend.txt
• Running marker: <prefix>_process_running_trend.txt
• Batch file: <TerminalDataPath>\MQL5\python_for_ea\bat\get_trend_reply.bat

H1 Entry Candidate Generation

• MQL5 output: <prefix>_ohlc_H1.csv
• Python output: <prefix>_target_prices.txt, <prefix>_target_zones.txt
• Done marker: <prefix>_process_done_entry.txt
• Running marker: <prefix>_process_running_entry.txt
• Batch file: <TerminalDataPath>\MQL5\python_for_ea\bat\get_entry_reply.bat

During OnInit(), the EA resolves MQL5\python_for_ea from TerminalInfoString(TERMINAL_DATA_PATH) and builds absolute batch-file paths. Each batch file resolves the Python project root from its own location, so runtime execution no longer depends on C:\ea_py.

target_prices.txt must contain 13 lines:

Line 1: res_chk
Lines 2-4:   T1 Buy Stop entry/tp/sl
Lines 5-7:   T2 Buy Limit entry/tp/sl
Lines 8-10:  T3 Sell Stop entry/tp/sl
Lines 11-13: T4 Sell Limit entry/tp/sl

target_zones.txt must contain 7 lines for split entries:

Line 1: schema_version (2)
Line 2: res_chk
Line 3: candidate_id derived from the closed H1 bar time
Line 4: T1 Buy Stop strategy, zone_low, zone_high, tp, sl
Line 5: T2 Buy Limit strategy, zone_low, zone_high, tp, sl
Line 6: T3 Sell Stop strategy, zone_low, zone_high, tp, sl
Line 7: T4 Sell Limit strategy, zone_low, zone_high, tp, sl

Python creates process_done_entry.txt only after both target_prices.txt and target_zones.txt have been written. When split entries are disabled, the EA keeps using the legacy 13-line target_prices.txt path.

6. Entry Conditions

New entries are allowed only when all conditions below are satisfied:

• Spread is less than or equal to spread_limit.
• H4 trend analysis is complete and trend_state.txt can be loaded.
• H1 entry candidate generation is complete and target_prices.txt can be loaded.
• res_chk = 1.
• The H1 candidate set has not expired under ENTRY_H1_LIMIT.
• The H1 candidate set has not exceeded input_entry_max_candidate_age_minutes since it was loaded.
• The selected order type has valid entry/tp/sl values greater than 0.0.
• The order type is allowed by the H4 market_state.
• The order-type price relationship and broker minimum distance rules are satisfied.
• When use_m15_entry_filter = true, T2/T4 satisfy the M15 direction, rejection, and proximity checks. T1/T3 satisfy M15 impulse confirmation when use_m15_imbalance_confirmation = true.
• This EA's pending orders plus positions are below input_position_limit.
• When split entries are enabled, target_zones.txt has res_chk = 1, the predicted zone prices are valid, split lots fit SYMBOL_VOLUME_MIN/MAX/STEP, and no duplicate order or position exists for the same candidate_id + slot.

market_state and Allowed Order Types

• 0 MARKET_LOW_VOL_RANGE: Allows T2 Buy Limit / T4 Sell Limit.
• 1 MARKET_HIGH_VOL_RANGE: Allows T2 Buy Limit / T4 Sell Limit.
• 2 MARKET_LOW_VOL_UP: Allows T1 Buy Stop / T2 Buy Limit.
• 3 MARKET_HIGH_VOL_UP: Allows T1 Buy Stop / T2 Buy Limit.
• 4 MARKET_LOW_VOL_DOWN: Allows T3 Sell Stop / T4 Sell Limit.
• 5 MARKET_HIGH_VOL_DOWN: Allows T3 Sell Stop / T4 Sell Limit.
• 6 MARKET_TECHNICAL_ERROR_STOP: Blocks new entries.

Order-Type Price Rules

• T1 Buy Stop: Ask < entry, tp > entry, sl < entry
• T2 Buy Limit: Ask > entry, tp > entry, sl < entry
• T3 Sell Stop: Bid > entry, tp < entry, sl > entry
• T4 Sell Limit: Bid < entry, tp < entry, sl > entry

7. Exit Conditions

• Pending orders are cancelled after ENTRY_H1_LIMIT * PeriodSeconds(PERIOD_H1) has elapsed from setup time.
• Positions are closed after CLOSE_H1_LIMIT * PeriodSeconds(PERIOD_H1) has elapsed from entry time.
• Time-limit handling runs early in OnTick and is independent of Python readiness or spread checks.
• On EA removal, OnDeinit() releases external-process state and the SLTP panel, then clears the chart status text with Comment("") and ChartRedraw(0).
• When input_sltp_manager_enabled or the panel Manager toggle is ON, the EA runs CSLTPManager::ManagePositions() and HighVolatilityLimit() after time-limit handling. Existing-position SL protection therefore continues while Python results are pending or new entries are skipped.
• Normal break-even and active trailing are mutually exclusive. The panel turns one mode off when the other is enabled, and CSLTPManager::ValidateSettings() also validates the exclusion.

7.1 SLTP Control Panel

• The panel is created when input_sltp_show_panel = true and appears near the chart's upper-right area.
• If panel creation fails, the EA logs the failure and continues with the already-applied input-based SLTP settings.
• The Manager button toggles all SLTP management. When OFF, panel values remain stored but OnTick does not modify SL values.
• The BreakEven, Elapsed BE, Active Trail, TP Progress, and High Vol buttons toggle each CSLTPManager feature.
• Numeric fields are validated when APPLY is pressed. Invalid or out-of-range values show a MessageBox, are logged, and revert to the previous valid value.
• Settings are copied into CSLTPManager only after APPLY succeeds. The EA then calls ValidateSettings(); if validation fails, SLTP management is stopped and the reason is logged.

8. Risk Management

• Managed orders and positions are limited to matching _Symbol and magic_number.
• input_position_limit counts only this EA's orders and positions, not the full account. The hard internal limit is POSITION_LIMIT.
• The EA selects the filling policy from SYMBOL_FILLING_MODE, preferring IOC, then FOK, then RETURN.
• Pending orders receive server-side expiration when the broker supports it.
• OrderSend return values and MqlTradeResult.retcode are checked. Failures are logged with GetLastError() or the retcode.
• Split-entry order comments include candidate_id and slot number to prevent duplicate slot execution.
• When cancel_old_split_pending_on_new_zone = true, a new valid candidate_id cancels older split pending orders, and an invalid or stopped target_zones.txt cancels all existing split pending orders for this EA/symbol/magic.
• SLTP management only targets existing positions matching _Symbol and magic_number, and it preserves each position's current TP.
• SL changes are sent only when the candidate improves protection relative to the current SL and satisfies broker stop-level and freeze-level constraints.

9. Error Handling

• If trend_state.txt is missing, unreadable, not strictly parseable as an integer, or outside 0..6, the EA uses MARKET_TECHNICAL_ERROR_STOP.
• If target_prices.txt is missing, unreadable, shorter than 13 lines, or contains a non-strict numeric line, the EA uses res_chk = 0.
• When split entries are enabled, missing target_zones.txt, schema mismatch, fewer than 7 lines, res_chk != 1, or non-strict numeric values stop new split orders.
• If a Python process exits with a non-zero code, the code is logged and the next trigger may retry.
• If only a stale running marker remains, the EA attempts PID recovery. If recovery fails and the marker is timed out, it removes the stale marker.

10. Changelog

2026-05-30

• Added the HIT_<symbol>_<magic_number> linkage-file prefix contract on both the MT5 and Python sides to avoid collisions across multiple EAs or symbols in the same terminal.
• Updated T1/T3 trend-following candidates so use_m15_imbalance_confirmation = true requires M15 impulse confirmation.
• Added strict numeric parsing requirements for trend_state.txt, target_prices.txt, and target_zones.txt, with invalid content handled as a safe stop state.
• Added stale split-pending cancellation behavior when target_zones.txt is invalid or stopped.
• Synchronized current defaults for input_entry_max_candidate_age_minutes, ENTRY_H1_LIMIT, SLTP buffers, and the Python entry-distance guard.

2026-05-27

• Moved the Python helper application specification from C:\ea_py to MQL5\python_for_ea under the MT5 data folder.
• Updated the EA startup path model so batch paths are built from TerminalInfoString(TERMINAL_DATA_PATH), and the external process working directory is derived from the batch-file location.
• Updated Python path discovery so the default MT5 linkage is the adjacent MQL5\Files directory, with MT5_FILES_DIR or MT5_DATA_PATH available for explicit overrides.

2026-05-24

• Added Python-side target_zones.txt output and made process_done_entry.txt appear only after both target_prices.txt and target_zones.txt are written.
• Added use_split_entry_zone, split_entry_count, split_lot_mode, split_total_lot_size, split_fixed_lot_size, and input_position_limit.
• Added split-zone pending order placement with total-lot or fixed-lot sizing.
• Added candidate_id + slot identification to prevent duplicate split orders.

2026-05-13

• Added a Python-side H1 EATR distance guard that invalidates candidates too far from the current price before they are passed to MT5.
• Added input_entry_max_candidate_age_minutes on the EA side so stale H1 candidates are not executed when M15 confirmation arrives late.
• Added H1 candidate age to entry skip logs to make delayed entries, M15 rejection, and price mismatch easier to diagnose.

2026-05-05

• Added Comment("") and ChartRedraw(0) to OnDeinit() so the chart status comment is removed when the EA is deleted.
• Connected CSLTPManager and the dedicated chart panel SLTPManagerPanel.mqh to HIT-EA_refactor_ver5.mq5, allowing UI control of break-even, elapsed-time break-even, active trailing, TP-progress SL, and high-volatility SL tightening.
• Added SLTP management immediately after time-limit handling in OnTick, so existing-position protection continues independently of Python readiness and spread checks.
• Added SLTP panel inputs, mutual exclusion for normal break-even versus active trailing, and numeric validation on APPLY.
• Split the function implementations from HIT-EA_refactor_ver5.mq5 into purpose-specific .mqh files.
• Kept OnInit, OnDeinit, OnTick, inputs, and global state in the EA source while moving behavior functions under Include/MyLib/.
• Updated the specification to match the current CreateProcessW Python process tracking, M15 filter, market_state range 0..6, and spread_limit = 60.

2026-05-02

• Added entry suppression when res_chk = 0.
• Moved time-limit handling before Python readiness and spread checks.
• Split startup flags for H4 and H1 initial processing.
• Switched OHLC retrieval to CopyRates and exported closed bars only.