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Can't get the min and max of 15 minutes

In previous versions of quantopian I believe I was able to get the min or max values as follows:

HighRange = max(history(15, '1m', 'high'))
LowRange = min(history(15, '1m', 'low'))

Now it seems that is not working. Can someone shed some light? Much appreciated.

EG

1 response

OK Fellas,

After debugging I found the issue:

HighRange = history(15, '1m', 'high')[context.spy].max()
LowRange = history(15, '1m', 'low')[context.spy].min()

EG