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# question

Accepted
22 4 5 8

## Annual Total Traded Volume of Commodity

I need the total traded volume (annually) for Natural Gas commodity at NYMEX. For that purpose, if I write this code in Python API, I need to clarify what volumes does this code provides?Even if it provides the monthly total volume, it is still for just these future contracts and how to retrieve for all contracts in a single code line?
`req = ek.get_timeseries(["NGc1", 'NGc2', 'NGc3', 'NGc4', 'NGc5'],['VOLUME'], start_date = "2011-01-01", end_date = "2020-12-31", interval="monthly")`

Any lead will be highly appreciated.

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· Write an Answer
Accepted
15.3k 32 5 10

The field Accumulated Volume is the sum of the volume in each calendar year as shown in the screenshot of DIB posted by Jason above.

Plus, to get contracts of NGc1 till NGc158, you may use the code below

```rics = []
for i in range (158):
rics.append('NGc'+str(i+1))
print(rics)

req,err = ek.get_data(rics,['TR.ACCUMULATEDVOLUME.date','TR.ACCUMULATEDVOLUME'],parameters= {'SDate':"2011-01-01", 'EDate':"2020-12-31",'Frq':"CY",'CALCMETHOD':'SUM'})

req```

Hope this could help

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10.8k 21 6 9

```req,err = ek.get_data(["NGc1", 'NGc2', 'NGc3', 'NGc4', 'NGc5'],['TR.ACCUMULATEDVOLUME.date','TR.ACCUMULATEDVOLUME'],parameters= {'SDate':"2011-01-01", 'EDate':"2020-12-31",'Frq':"CY",'CALCMETHOD':'SUM'})

req```

Is this OK for you?

Regarding descriptions for fields you can use the Data Item Browser app which allows you to look for all fields for an instrument and get the descriptions, parameters as well as values - seee below - noote in the bottom right of the app you can see the field formula being built up for you as you select parameters - which allows you to easily copy paste into the get data function say.

I hope this can help.

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