I would suggest to stay away from the site if you aren't really need to use their services. I took a glance at their site, and although this doesn't directly indicate they're scam, but several things raises my concern, such as:
1. Their favicon --that logo on the your browser tab next to the site title-- and the header of their site shows
tickmill logo and name. I'm not sure if they use a template from somewhere --a theme detector I use shows zero result, though-- and forgot to change them or intentionally uses their logo to boost false confidence by making the site viewer think both companies are related. However, Tickmill's official website didn't include them in the list of their group of companies, nor a google keyword tickmill and storeaus brings any result, which --IMO-- means there were no such partnership or relation at any degree between them.
2. Their site is not exactly secured, as can be seen from warning if you tried to access them through chrome or duckduckgo --the browser, not the search engine. In my personal opinion, a secured and encrypted website is a must factor for those who caters exchange platform
3. And this is probably the most crucial thing that I should have lead with this, LOL, they don't have a sign up page. Not the one that I can find. How would you trade on a site that didn't allow sign up? More importantly, why a trading site made such a fatal error to not including a sign up page on their site. However, if you can find their sign up page, I am willing to sign up for you, just to see and conduct further investigation.