Issue of charts with Futures and index

[rimko]

Describe the bug Hi,

Theire is an issue with continious future tickers, on some i can't display a other timeframe then 1D, on some other SotckTicker refuse to show any timeframe and i get a error message "impossible to retrive the data" Exemple of some ticker :

• ES=F
• 6E=F
• C=F I get the same issue on a specific contract like for exemple s&p emini contract of June 21:
• ESM21.CME Every CME futurs continous contract get same issue, i haven't try on Euronext or other fururs exchange.

I also get the issue on some index like :

• ^VVIX Wirdly not on other on like:
• ^VIX

Liste of continious future tickers: https://finance.yahoo.com/commodities/?guccounter=1

To Reproduce Steps to reproduce the behavior:

1. Add a futurs ticker like "ES=F"
2. Select the ticker on your watchlist
3. Try to change the timeframe
4. See error

Expected behavior Be able to see the chart on the current or other timeframe.

Smartphone (please complete the following information):

• Device: Xiaomi K20
• OS: Android 10 (Lineage)
• Browser: Firefox 88.1.1
• Version: Stocks Widget 3.9.738

[RayLennox]

Same issue here

[wilx]

I wonder if the issue #241 is related / same.