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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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38
chart_generator.py
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@@ -45,9 +45,22 @@ class ChartGenerator:
# Fill area under the line
ax.fill_between(dates, closes, alpha=0.3, color='#00d4ff')
# Format x-axis
ax.xaxis.set_major_formatter(mdates.DateFormatter('%m/%d'))
ax.xaxis.set_major_locator(mdates.AutoDateLocator())
# Format x-axis (detect if intraday or multi-day)
if len(dates) > 0:
# Check if all data is from the same day
first_date = dates[0].date()
last_date = dates[-1].date()
is_intraday = first_date == last_date
if is_intraday:
# Show time for intraday data
ax.xaxis.set_major_formatter(mdates.DateFormatter('%H:%M'))
ax.xaxis.set_major_locator(mdates.HourLocator(interval=1))
else:
# Show date for multi-day data
ax.xaxis.set_major_formatter(mdates.DateFormatter('%m/%d'))
ax.xaxis.set_major_locator(mdates.AutoDateLocator())
plt.xticks(rotation=45, ha='right')
# Grid styling
@@ -125,9 +138,22 @@ class ChartGenerator:
bottom = min(opens[i], closes[i])
ax.bar(dates[i], height, width, bottom=bottom, color=color, alpha=0.8)
# Format x-axis
ax.xaxis.set_major_formatter(mdates.DateFormatter('%m/%d'))
ax.xaxis.set_major_locator(mdates.AutoDateLocator())
# Format x-axis (detect if intraday or multi-day)
if len(dates) > 0:
# Check if all data is from the same day
first_date = dates[0].date()
last_date = dates[-1].date()
is_intraday = first_date == last_date
if is_intraday:
# Show time for intraday data
ax.xaxis.set_major_formatter(mdates.DateFormatter('%H:%M'))
ax.xaxis.set_major_locator(mdates.HourLocator(interval=1))
else:
# Show date for multi-day data
ax.xaxis.set_major_formatter(mdates.DateFormatter('%m/%d'))
ax.xaxis.set_major_locator(mdates.AutoDateLocator())
plt.xticks(rotation=45, ha='right')
# Grid styling