Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
I no nothing about it, go back to main page and contact support, may have an answer.
Do you mean having one only trade at a time only? You need to use a 'No trade' block on top of your structure.
