Installing Multiple Instances of ThinkOrSwim (Windows10).
The TOS application must be installed twice in two different directories.
Create two shortcuts and execute each one.
I keep several of my charts, watchlists, scanner on one instance and my main charts, watchlist, detached position statement, and active trader in another. The 2nd instance would not run when I maxed out the memory setups in the sign-in boxes even though I have 32gb of ram. I had to play w/ the ram settings in the sign-in boxes to optimize;
I save different workspace setups for each instance that I swap out depending if it is a bear or bull day and on what strategies I am setting up for.
Supposedly, the rumor is that TOS does not take advantage of dual-core processors therefore multiple instances can possibly improve performance. It did improve my lag but didn't totally solve; especially in the first few minutes after the bell.
HTH