Kunthawat Greethong
b26c8199a5
Changes: - Add FAL_KEY and GEMINI_API_KEY to .env.example - Update picture-it to use ~/.config/opencode/.env (unified creds) - Remove shodh-memory skill (no longer used) - Remove alphaear-* skills (deprecated) - Remove thai-frontend-dev skill (replaced by website-creator) - Remove theme-factory skill - Add mql-developer skill (MQL5 trading) - Add ecommerce-astro skill (Astro e-commerce) - Add website-creator skill (Next.js + Payload CMS) - Update install script for new skills
119 lines
4.1 KiB
Markdown
119 lines
4.1 KiB
Markdown
---
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name: fibo-zone-indicator
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description: >
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Multi-timeframe Fibonacci retracement + S/R indicator for MetaTrader 5.
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Draws buy zones (61.8-80.1% retracement) on lower portion of bars with TP/SL lines,
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plus support/resistance levels and psychological price levels.
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Built for XAUUSD (gold) but works on any symbol.
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category: mql5
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---
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# FiboZone Indicator — MQL5 Implementation
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## Overview
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Indicator สำหรับ XAUUSD — แสดง Fibonacci retracement zones จาก D1/H4/H1 พร้อม:
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- Buy zone (61.8-80.1%) อยู่ lower portion ของแท่ง
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- TP/SL lines
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- Support/Resistance levels (จาก 20 bars ย้อนหลัง)
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- Psychological price levels
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## Key Code Patterns
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### MQL5 Array Parameter Syntax
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**CRITICAL**: When passing arrays OUT of a function (output parameters), use reference-to-array syntax:
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```mql5
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// WRONG — treats as reference to single element
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int FindSRLevels(const double &highs[], const double &lows[], int count,
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SSRLevel &srOut, int maxOut)
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// CORRECT — reference to array
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int FindSRLevels(const double &highs[], const double &lows[], int count,
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SSRLevel &srOut[], int maxOut)
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```
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Every declaration, definition, and call site must use `[]` on array parameters. Mismatch causes compile errors: `cannot convert 'double[]' to 'double&'`.
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### ArrayResize Before Indexing
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Always `ArrayResize` on output arrays BEFORE writing to them:
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```mql5
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// WRONG — array out of range
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for(int i = 0; i < outCount; i++)
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srOut[i] = filtered[i];
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// CORRECT
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ArrayResize(srOut, outCount);
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for(int i = 0; i < outCount; i++)
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srOut[i] = filtered[i];
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```
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### Fibo Zone Calculation — Lower Portion
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User clarified: Fibo tool 0% = TOP, 100% = BOTTOM. Zone 61.8-80.1% must be in LOWER portion of the bar.
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**Bullish bar** (close > open): Zone near LOW → subtract from HIGH
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```mql5
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r.zoneHigh = high - barHeight * 0.618; // closer to high
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r.zoneLow = high - barHeight * 0.801; // closer to low (lower portion)
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```
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**Bearish bar** (close < open): Zone near LOW of the bar → add from LOW
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```mql5
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r.zoneHigh = low + barHeight * 0.801; // closer to high
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r.zoneLow = low + barHeight * 0.618; // closer to low (lower portion)
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```
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### Calculation Test (Manual)
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Bullish bar: High=4766, Low=4664, Bar=102
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```mql5
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// Lower portion of bullish bar:
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zoneHigh = 4766 - 102 * 0.618 = 4702.96
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zoneLow = 4766 - 102 * 0.801 = 4684.30
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// Zone: [4684, 4703] ✅ in lower portion (closer to low)
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```
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Bearish bar: High=4766, Low=4664, Bar=102
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```mql5
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// Lower portion of bearish bar:
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zoneHigh = 4664 + 102 * 0.801 = 4745.70
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zoneLow = 4664 + 102 * 0.618 = 4727.04
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// Zone: [4727, 4746] ✅ in lower portion
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```
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### OBJ_RECTANGLE for Price Zones
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`OBJ_RECTANGLE` needs distinct time1 and time2 to span chart width:
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```mql5
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// WRONG — time1 == time2 → zero-width (looks like vertical line)
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ObjectCreate(0, name, OBJ_RECTANGLE, 0, anchorTime, zoneLow, anchorTime, zoneHigh);
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// CORRECT — time2 = far future → spans full chart width
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datetime rightTime = D'2099.12.31 23:59:59';
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ObjectCreate(0, name, OBJ_RECTANGLE, 0, anchorTime, zoneLow, rightTime, zoneHigh);
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ObjectSetInteger(0, name, OBJPROP_FILL, true);
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ObjectSetInteger(0, name, OBJPROP_COLOR, ColorToARGB(zoneColor, 60));
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```
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### S/R Zone Width Parameter
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`InpSRZoneWidth` groups similar prices into one S/R zone. Must be smaller than the actual price range:
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```mql5
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// Example: XAUUSD range ~100 points over 20 bars
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// zoneWidth = 200 → all bars in ONE zone → only 1-3 S/R lines
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// zoneWidth = 50 → ~2 zones → more S/R lines
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input int InpSRZoneWidth = 50;
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input int InpSRMinHits = 2; // lower from 5 to see more lines
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input int InpMaxSR = 4;
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```
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## Common Bugs Fixed
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| Bug | Fix |
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|-----|-----|
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| `cannot convert double[] to double&` | Change all array params to `&arr[]` syntax |
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| `array out of range` at line N | Add `ArrayResize(srOut, count)` before `srOut[i] =` |
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| Rectangle looks like vertical line | Set `time2 = D'2099.12.31'` not `anchorTime` |
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| Fibo zone in wrong portion | Use high-subtract for bullish, low-add for bearish |
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| S/R zoneWidth=200, only 3 lines | Reduce to ~50 for XAUUSD range |
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