Yahoo finance & google finance bad daily data

I was following spy yesterday, and I put a market order in spy < 332, order did not activate as minimum price was about 333. You can see also I n the yahoo finance chart for yesterday

Now if you watch yahoo finance historical prices today you can see yesterday low is 330.20 (it is not true). Same shit in gdrive

From 333.17 (real low) to 330.20 (fake data in yfinance) there is a near 1% error.

This is not first time I see it.
There is any place or api I can get real end day market prices for SPY, I need to re-backtest my strategy with most accurate data.

Submitted November 04, 2020 at 05:15AM by optionexpert

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