MC can handle via DDE interface maximal ca. 100 updates per second, what is much to less if one seriously want to do trading.
Above this value you get big delay/desynchronization between market data and MC displayed data !
For Patsystems the situation is worser, here you can get maximal ca. 20 updates per second !
(because the guys from tssupport puted PatsWrapper.exe COM server between tsServer.exe and the PATSAPI.DLL, donno why !)
Check you data for delay/desynchronization between datafeed and MC chart !
ciao
radekj