You can test drive by running itrade (http://secure.itradecimb.com.my/ipad/) on Safari web browser for both Mac OS or Windows. Firefox works also but don't know how compatible. I assume you already have an itrade account.

I found it snappier, maybe because it does not use Java. itrade for iPad have some missing feature, notably no report and does not display credit limit.

Yes, that's why I said "I assume you already have an itrade account".