[BUG] Mouse-hover date is 1 day off (into the past)

Requirements (place an x in each of the [ ])**

• I realize finplot is not a web lib. (Hint: it’s native!)
• I’ve read the snippets and not found what I’m looking for.
• I’ve searched for any related issues and avoided creating a duplicate issue.
• I’ve updated finplot (pip install -U finplot).
• I’ve supplied the required data to run my code below.

Code to reproduce (from the repo. ReadMe front-page tutorial, but running with ‘SPY’)

import finplot as fplt
import yfinance

df = yfinance.download('SPY')
fplt.candlestick_ochl(df[['Open', 'Close', 'High', 'Low']])
fplt.show()

Describe the bug

When I run the snp500.py example (in finplot/examples), it shows the all-time-high candle date (when you mouse-hover over it) as 2022-1-3. That is 1 day off. It should read “2022-1-4”.

OS: Windows 11 finplot version: 1.8.1

p.s.

Thank you SO MUCH for creating Finplot!! It’s awesome and I love it!! 😃

[highfestiva]

Thanks for the praise, means a lot for a maintainer who gets a lot of flak for developing stuff. The tip of the iceberg is stuff I needed myself, the remaining stuff is for the community. Glad you like it! 😃

[ShivaSmith]

Thanks for your thoughts on this. Yeah I think we have this sorted now, so I’ll close it. I should have looked more closely at how yfinance handles (or doesn’t handle time zones). yfinance states: “Note: yahoo finance datetimes are received as UTC.”

Here’s what worked for me to get Eastern time – for daily bars (for SPY), not for intraday, this works:

df.index = df.index.tz_localize('America/New_York')

Only after making that call, then the ATH for SPY is correctly shown on the FinCrossHair as 3/4. Well, that or (effectively) changing the Finplot time setting to UTC with:

fplt.display_timezone = None

For intraday (only tested 1 hour bars), no adjustment at all is needed – dates and times appear to be correct automagically for intraday… 😃