dfb418c7b2
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Three fixes for overseas stock trading failures:
1. Price API exchange code mapping:
- get_overseas_price() now applies _PRICE_EXCHANGE_MAP (NASD→NAS, NYSE→NYS, AMEX→AMS)
- Price API HHDFS00000300 requires short exchange codes same as ranking API
2. rt_cd check in send_overseas_order():
- Log WARNING (not INFO) when rt_cd != "0" (e.g., "주문가능금액이 부족합니다")
- Caller (main.py) checks rt_cd == "0" before calling log_trade()
- Prevents DB from recording failed orders as successful trades
3. Limit order price premium for BUY:
- BUY limit price = current_price * 1.005 (0.5% premium)
- SELL limit price = current_price (no premium)
- Improves fill probability: KIS VTS only accepts limit orders,
and last price is typically at or below ask
4. PAPER_OVERSEAS_CASH fallback (config + main.py):
- New setting: PAPER_OVERSEAS_CASH = 50000.0 (USD)
- When VTS overseas balance API fails/returns 0, use this as simulated cash
- Applied in both trading_cycle() and run_daily_session()
5. Candidate price fallback:
- If price API returns 0, use scanner candidate price as fallback
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>