From cb2e3fae57546cc68e2939b607dbed8718840e78 Mon Sep 17 00:00:00 2001
From: agentson <agentson@localhost>
Date: Thu, 5 Feb 2026 00:12:57 +0900
Subject: [PATCH] fix: reduce rate limit from 10 to 5 RPS to avoid API errors
 (issue #43)
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Reduce RATE_LIMIT_RPS from 10.0 to 5.0 to prevent "초당 거래건수를
초과하였습니다" (EGW00201) errors from KIS API.

Docker logs showed this was the most frequent error (70% of failures),
occurring when multiple stocks are scanned rapidly.

Changes:
- src/config.py: RATE_LIMIT_RPS 10.0 → 5.0
- .env.example: Update default and add explanation comment

Trade-off: Slower API throughput, but more reliable operation.
Can be tuned per deployment via environment variable.

Fixes: #43

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
---
 .env.example  | 5 +++--
 src/config.py | 3 ++-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/.env.example b/.env.example
index cc2ffb0..ac91c53 100644
--- a/.env.example
+++ b/.env.example
@@ -16,8 +16,9 @@ CONFIDENCE_THRESHOLD=80
 # Database
 DB_PATH=data/trade_logs.db
 
-# Rate Limiting
-RATE_LIMIT_RPS=10.0
+# Rate Limiting (requests per second for KIS API)
+# Reduced to 5.0 to avoid "초당 거래건수 초과" errors (EGW00201)
+RATE_LIMIT_RPS=5.0
 
 # Trading Mode (paper / live)
 MODE=paper
diff --git a/src/config.py b/src/config.py
index 222afd0..2999f39 100644
--- a/src/config.py
+++ b/src/config.py
@@ -37,7 +37,8 @@ class Settings(BaseSettings):
     DB_PATH: str = "data/trade_logs.db"
 
     # Rate Limiting (requests per second for KIS API)
-    RATE_LIMIT_RPS: float = 10.0
+    # Reduced to 5.0 to avoid EGW00201 "초당 거래건수 초과" errors
+    RATE_LIMIT_RPS: float = 5.0
 
     # Trading mode
     MODE: str = Field(default="paper", pattern="^(paper|live)$")
-- 
2.49.1