It's actually a part of the maquarie prime platform. I'm not sure if available as a standalone product. The only requirement to open an acount though is a $5k starting balance IIRC.
Personally I prefer standalone charting packages like Amibroker but I tend to use macprime more often for a few reasons:
1/ I'm a linux user and running Amibroker inside linux is a pain 2/ The data is part of the package so no need to maintain data subscriptions. 3/ Intraday data is available down to tick level and is streamed in realtime.
The downsides of it are: 1/ It's a java applet so you have to login into the website to launch it. And it kicks you out after 12 hours. 2/ The data quality can be sketchy with some stocks. If stock has a split/consolidation or name change the data basically starts again from scratch. E.g. AWD I can only get data going back few months even though it traded under it's old name (GDN) for years before that.