Stock splits not taken into acount

[tavurth]

I'm using candle.adj_close and still it seems to be broken.

TSLA

AAPL

Here's the last few days of data from AAPL

adj_close	close
132.76	132.76
127.58	127.58
504.05	504.05
508.57	508.57
504.7165	504.7165
498.79	498.79
514.79	514.79
477.05	477.05
463	463
463.933	463.933
457.41	457.41
464.25	464.25
459.315	459.315
457.72	457.72
441.99	441.99
447.875	447.875
450.4	450.4
452.82	452.82
441.62	441.62
437.51	437.51
436.53	436.53
432.8	432.8
411.535	411.535
376.75	376.75
375	375
377.47	377.47
374.84	374.84
363.95	363.95
387.99	387.99
386.77	386.77
396.69	396.69
385.67	385.67
387.95	387.95
386.25	386.25
395.96	395.96
379.36	379.36
389.06	389.06
381.34	381.34
385.05	385.05
376.72	376.72
375.41	375.41
370	370

[iiromutikainen]

I agree. This is a very important feature and it should be working.

[nima]

+1

[Fredrik-C]

It is sad to see that 8 months later there is still issues with split adjusted data, some tickers are adjusted and some are not.

All my backtrading algoritms are now trash since I found out that Marketstack has bad data quality.

[bmmsea]

And now it's almost 4 years later, and the incorrect adjusted data is still not fixed:

https://api.marketstack.com/v1/eod?access_key=[REDACTED]&symbols=GOOGL&date_from=2022-07-10&date_to=2022-07-19

The trading day just before the split date (2022-07-18) is corrected, but everything prior is incorrect. It's like their code to adjust the prices only applied to a single day.

It's worse to give bad data than it is to just not give the data at all. It calls into question the reliability of all their numbers.