Howto on volume ='mt4'|vol!eurusd

I am not getting volume to work, the mt4 sample does not have volume
I have tried these but not getting volume to work i have bid,ask,hi,low working but not volume
='MT4'|VOL!EURUSD
='MT4'|VOLUME!EURUSD
=MT4|VOL!EURUSD
=MT4|VOLUME!EURUSD

I am not getting these to work

If it's not in the sample, then most likely it's not possible to obtain it via DDE.Why would you need volume anyway? Spot forex is over the counter, volume in Metatrader via your broker would not be very accurate.
I just looked in the help file for Metatrader as well, it's not possible to get volume, only bid, ask, high, low, time and a full quote.

I did read the help section-
the history center has volume and it can be exported by csv

I planned on getting several brokers volume and average together

The history center does not use DDE(Dynamic Data Exchange) to export to csv or to import hst files so your logic is flawed.

DDE is only used for exchanging data between different applications(in this case between Metatrader and Excel), not inside the same application.

You will have to find another way to get volume data, like coding a script to query the history at certain intervals and then send it to Excel via DDE, but you will have to do this by yourself since there's no automated way of doing it at least none that I know and it most likely won't be easy or worth to do.