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Switch to candlestick charts with 30-day daily data

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- Replace line charts with candlestick charts for better visualization
- Green candles for up days, red for down days
- Daily resolution (30 days) - free tier compatible
- Auto-detect intraday vs daily data for proper time/date formatting
- Note: 5-min intraday requires paid Polygon tier ($199/month)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
This commit is contained in:
Michael Simard
2025-12-26 12:14:15 -06:00
parent f5d05192b9
commit 1325863837
4 changed files with 138 additions and 22 deletions
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41
polygon_api.py
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@@ -26,23 +26,44 @@ class PolygonAPI:
Args:
ticker: Stock ticker symbol
days: Number of days of historical data to fetch
resolution: Candle resolution (ignored, always daily)
days: Number of days of historical data to fetch (ignored for intraday)
resolution: Candle resolution ('D' for daily, '5min' requires paid tier)
Returns:
Dictionary with OHLCV data or None if unavailable
"""
try:
# Calculate date range (end yesterday to avoid missing today's data)
end_date = datetime.now() - timedelta(days=1)
start_date = end_date - timedelta(days=days)
if resolution == '5min':
# For 5-minute bars, get current day data
# Start at market open (9:30 AM ET)
import pytz
et_tz = pytz.timezone('America/New_York')
now_et = datetime.now(et_tz)
# Format dates as YYYY-MM-DD
from_date = start_date.strftime('%Y-%m-%d')
to_date = end_date.strftime('%Y-%m-%d')
# Set to today at 9:30 AM ET
market_open = now_et.replace(hour=9, minute=30, second=0, microsecond=0)
# Build API URL
url = f"{self.base_url}/v2/aggs/ticker/{ticker}/range/1/day/{from_date}/{to_date}"
# If current time is before market open, use yesterday
if now_et < market_open:
market_open = market_open - timedelta(days=1)
now_et = market_open.replace(hour=16, minute=0) # Use previous day's close
from_date = market_open.strftime('%Y-%m-%d')
to_date = now_et.strftime('%Y-%m-%d')
# Build API URL for 5-minute bars
url = f"{self.base_url}/v2/aggs/ticker/{ticker}/range/5/minute/{from_date}/{to_date}"
else:
# Daily bars - Calculate date range (end yesterday to avoid missing today's data)
end_date = datetime.now() - timedelta(days=1)
start_date = end_date - timedelta(days=days)
# Format dates as YYYY-MM-DD
from_date = start_date.strftime('%Y-%m-%d')
to_date = end_date.strftime('%Y-%m-%d')
# Build API URL for daily bars
url = f"{self.base_url}/v2/aggs/ticker/{ticker}/range/1/day/{from_date}/{to_date}"
# Make request
params = {