think or swim, and forex.cons apps are the only ones I have tried. Because i have an account with TOS and a demo with forex.com. But they both automatically update the chart every three seconds or so.
I know it sucks but depending on what kind of tradin you are doing and how fast your screen refreshes when you push refresh it should be ok for most everything except scalping trades.
Position trades and even most day trades should be fine.
I take it you would only be tradin on your iPad when you are away from your computer?
TOS's app is pretty good but im so used to trading on 2 30" screens that I only use it when i am away from home and see a good opportunity as I am constantly monitoring the markets on the go.
I do a lot of scalping trades too so iPhone and iPad trading doesn't work too good for me.
On the plus side the iPad is great for monitoring the markets.
I love the rueters market, bloomberg, black gold, and yahoo finance, apps.
And I have a futrures app for the iphone i use sometimes.
Only thing I wish I could do SOOO bad is bring up my electronic Investors Business Daily subscription.
I can bring up the full site but when I launch the interactive paper ( the online version of IBD) it will come uo with the layout but won't show the actual paper.
Sucks.