I use CommSec IRESS. It's free if your do more than six trades a month. One of the reasons I like it is for that exact reason...seeing if trades are buys or sells. I'll do a screenshot tomorrow to show you what I'm looking at.
LDX Price at posting:
10.5¢ Sentiment: Hold Disclosure: Held
A personalised tool to help users track selected stocks. Delivering real-time notifications on price updates, announcements, and performance stats on each to help make informed investment decisions.
(20min delay)