{{{{ please note that tradestation currently does not supports metastock intraday data, for doing intraday analysis you will have to use ASCII data. }}}
You can use globalserver to feed your Trade station in real time.
Globalserver can be fed using ManshiRT and Metaserver
I know of a vendor in Banglore who can help you with TradeStation data.
If in case you want I can provide you with his Tel No.
Its better to use Multicharts as it is much lighter on computer