Trading as bank's client?

How much trading capital is needed to be able to go trade in some big bank? And how does the trading itself differ from trading home with some broker, if it does? Can I still trade home as bank's client with their systems or would the trading happen physically in the bank? How about the expenses? Does the bank charge from every trade or is there some monthly payment and trading itself would be free?

If someone can answer to these, I'd be thankful!

Minimum account opening balance: USD 10,000 or equivalent in GBP, EUR, JPY or HKD.
http://www.citifxpro.com/default.asp...FVCE7QodPxnK-w

CitiFXpro is a retail platform...thats not what he is talking about.

If you want to trade using feeds and platform of big banks like UBS, Deutsche, mellon etc minimum is $250k and sometimes it is as high as $500K. You will need to buy the hardware for trading at home or pay monthly fee for letting the banks use their systems but you will not be sitting with their prop traders. And you will need aggregators to access their liquidity, they will provide SSL or some other kind of high cypher encrypted connection.

About commision and asset management fee, it depends upon how much business you are giving them. If the volumes are high enough (>400-500mio/month) you can negotiate the rules. And there is minimum trade size as well around $500K per click.