Just got the Tiingo API integrated with my code. This is a very young company so we have to see if it is stable enough as yet and if they have the server capacity to cope when millions will join. But their data quality is excellent. The JSON is more informative than the former Yahoo CSV and is in correspondence with data from SeekingAlpha for about 100 random US stock and ETF symbols that I have checked so far. The number of decimals in their corrected prices is much higher than the usual 2 from other sources. One limitation is a smaller coverage than Yahoo ichart. In particular I am missing European exchanges, stocks and ETFs. But I’ve got everything going again thanks to your link.