customization abilities of metatraders client

[Forex Trader]

Hello,

is it possible to customize the metatrader client? we would like to put in some new functionality, like a new button where our customers get a different look - no charting, just signals, programmed in mlq. If this is impossible, is there any ability to get the interface discription how the server is talking to the clients so that we setup our own client based on metatraders backed?

Regards

Lutz