# Migration Summary - Multi-Exchange Support

## What Changed

### 1. New Folder Structure
✅ Created `modules/exchanges/` folder containing:
- `bybit.py` (moved from `modules/bybit_klin.py`)
- `deribit.py` (moved from `modules/deribit_dvol.py`)
- `yfinance.py` (moved from `modules/yfinance_kline.py`)
- `__init__.py` (module initialization)

### 2. File Renaming
✅ `coins.txt` → `assets.txt` (original preserved)
- New format supports multiple exchanges per asset
- More descriptive name for mixed asset types

### 3. Updated Files

#### data_collector.py
- ✅ Updated imports to use `modules.exchanges.*`
- ✅ Added YFinance support
- ✅ Changed symbol storage format: `SYMBOL_EXCHANGE`
  - Example: `BTCUSDT_BYBIT`, `BTC-USD_YFINANCE`
- ✅ Renamed methods: `load_coins` → `load_assets`, `fetch_and_store_coin` → `fetch_and_store_asset`
- ✅ Updated statistics: `total_coins` → `total_assets`

#### backfill.py
- ✅ Updated imports to use `modules.exchanges.bybit`

#### modules/bybit_klin.py
- ✅ Removed circular import dependency

### 4. New Symbol Naming Convention

**Old Format:**
```
Symbol: BTCUSDT
Exchange: Bybit
```

**New Format:**
```
Price Data: BTCUSDT_BYBIT (exchange appended)
Volatility Data: BTC_DVOL (descriptive type)
```

This allows easy querying:
```sql
-- Get BTC price from Bybit
SELECT * FROM market_data WHERE symbol = 'BTCUSDT_BYBIT'

-- Get BTC volatility
SELECT * FROM market_data WHERE symbol = 'BTC_DVOL'

-- Get all BTC price data across exchanges
SELECT * FROM market_data WHERE symbol =~ /^BTC.*_(BYBIT|YFINANCE)$/

-- Get price and volatility together
SELECT * FROM market_data WHERE symbol =~ /^BTC/
```

### 5. Assets Configuration Examples

**assets.txt format:**
```
# Crypto assets
BTCUSDT bybit+deribit      # Stored as: BTCUSDT_BYBIT (price), BTC_DVOL (volatility)
ETHUSDT bybit+deribit      # Stored as: ETHUSDT_BYBIT (price), ETH_DVOL (volatility)
SOLUSDT bybit              # Stored as: SOLUSDT_BYBIT

# Yahoo Finance assets
BTC-USD yfinance           # Stored as: BTC-USD_YFINANCE
AAPL yfinance              # Stored as: AAPL_YFINANCE
^GSPC yfinance             # Stored as: ^GSPC_YFINANCE
```

## Quick Start Guide

### 1. Add Yahoo Finance Assets
Edit `assets.txt`:
```
# Add stocks
AAPL yfinance
GOOGL yfinance
MSFT yfinance

# Add crypto from Yahoo
BTC-USD yfinance
ETH-USD yfinance

# Add indices
^GSPC yfinance
^VIX yfinance
```

### 2. Run Data Collection
```bash
python data_collector.py
```

### 3. Query in InfluxDB/Grafana
```sql
-- All Bitcoin data from all sources
SELECT * FROM market_data WHERE symbol =~ /BTC/

-- Only Yahoo Finance data
SELECT * FROM market_data WHERE exchange = 'YFinance'

-- Compare BTC from Bybit vs Yahoo Finance
SELECT mean("close") FROM market_data 
WHERE (symbol = 'BTCUSDT_BYBIT' OR symbol = 'BTC-USD_YFINANCE')
AND time > now() - 24h
GROUP BY time(1h), symbol
```

## Benefits of New Structure

### 1. Multi-Exchange Support
- Easily compare prices across exchanges
- Store data from multiple sources simultaneously
- Clear identification of data source

### 2. Scalability
- Add new exchanges by creating a file in `exchanges/`
- Follow the same pattern for consistency
- No changes needed to core logic

### 3. Flexibility
- Mix crypto, stocks, indices, and forex
- Use different exchanges for different assets
- Easy to enable/disable exchanges per asset

### 4. Better Organization
- Exchange logic separated from core logic
- Clear module structure
- Easy to maintain and extend

### 5. Database Query Power
- Filter by exchange: `WHERE exchange = 'Bybit'`
- Filter by symbol: `WHERE symbol = 'BTCUSDT_BYBIT'`
- Pattern matching: `WHERE symbol =~ /USDT_BYBIT$/`
- Cross-exchange analysis: `WHERE symbol =~ /^BTC/`

## Backward Compatibility

✅ **Old module files preserved**: `modules/bybit_klin.py` and `modules/deribit_dvol.py` still exist
✅ **Old data remains**: Existing database records are not affected
✅ **Gradual migration**: You can migrate assets one by one

## Next Steps

1. **Test with Yahoo Finance**:
   ```
   # Add to assets.txt
   AAPL yfinance
   
   # Run collector
   python data_collector.py
   
   # Check InfluxDB
   # Look for symbol: AAPL_YFINANCE
   ```

2. **Update Grafana Dashboards**:
   - Modify queries to use new symbol format
   - Add exchange filters
   - Create cross-exchange comparison panels

3. **Add More Assets**:
   - Explore Yahoo Finance symbols
   - Add stocks, indices, forex, commodities
   - Mix with existing crypto data

4. **Monitor Performance**:
   - Check logs for successful fetches
   - Verify data quality in InfluxDB
   - Adjust intervals if needed

## Common Symbol Formats

### Bybit (Crypto Futures)
- `BTCUSDT`, `ETHUSDT`, `SOLUSDT`, etc.

### Deribit (Volatility)
- `BTC`, `ETH` (automatically extracts from pairs)

### Yahoo Finance
- **Stocks**: `AAPL`, `GOOGL`, `MSFT`, `TSLA`
- **Crypto**: `BTC-USD`, `ETH-USD`, `DOGE-USD`
- **Indices**: `^GSPC`, `^DJI`, `^IXIC`, `^VIX`
- **Forex**: `EURUSD=X`, `GBPUSD=X`
- **Commodities**: `GC=F`, `CL=F`, `SI=F`

## Troubleshooting

### Import Errors
If you see `Import "exchanges.bybit" could not be resolved`:
- This is a linting warning only
- Code will work at runtime
- Python will find the modules correctly

### Yahoo Finance Rate Limits
- Yahoo Finance may rate limit requests
- Add delays between requests if needed
- Use caching for frequently accessed data

### Interval Conversion
The system automatically converts intervals:
- Bybit `"60"` → Yahoo Finance `"1h"`
- Bybit `"1D"` → Yahoo Finance `"1d"`

## File Checklist

✅ Created:
- `exchanges/__init__.py`
- `exchanges/bybit.py`
- `exchanges/deribit.py`
- `exchanges/yfinance.py`
- `assets.txt`
- `MULTI_EXCHANGE_GUIDE.md`
- `MIGRATION_SUMMARY.md` (this file)

✅ Modified:
- `data_collector.py` - Full multi-exchange support
- `backfill.py` - Updated imports
- `modules/data.py` - Updated imports
- `modules/bybit_klin.py` - Removed circular import

✅ Preserved:
- `coins.txt` - Original file kept
- `modules/bybit_klin.py` - Still available
- `modules/deribit_dvol.py` - Still available
- `modules/yfinance_kline.py` - Still available

## Ready to Use!

Your market data collector now supports:
- ✅ Bybit crypto futures
- ✅ Deribit volatility index
- ✅ Yahoo Finance (stocks, crypto, indices, forex, commodities)
- ✅ Exchange-specific symbol naming
- ✅ Easy cross-exchange queries
- ✅ Unified configuration via `assets.txt`

Start adding assets to `assets.txt` and run `python data_collector.py`!
