Code wanted: Close all trade on close of 1 trade ( multiple closing trades script )

Hi,

I'm working on a EA, and i need a code which i can't figure out myself.

I have build a EA, which opens a trade and set pending trades... so far so good.

Now i want that EA to close all open trades ( long and short )on the current pair ( EA is running on 6 pairs at the time ) as soon as 1 trade is closed.

The Pending orders will be closed automatically which i already programmed..

To me its looks like it's no rocket science... but i can't do it... so to me it is...

Anyone here to help?

code has to be in MT4 not Mt5