With TTCM, accounts will be set up on the No Dealing Desk execution.
This means there are no restrictions on EA type (e.g. scalping, news trading, etc.). Expert Advisors on your previous TTCM TRADERS TRUST CAPITAL MARKETS LTD. MT4 account will be transferred to your TTCM MT4 account as is.
As such, the Expert Advisors you are using should recognize the open positions that are transferred to your TTCM account(s) and there is no need to close any positions and/or to reinstall your Expert Advisors.