In Tradestation, It seems no portfolio trading possible without having charts open, unless order objects, such as OrderTickets, used for real-time trading and can be used in RadarScreen for a list of symbols, which lot of coding skills required. I am looking for a way that if a simple formula in excel condition become true, it send orders to Tradestation. Something similar to to program that send orders between brokerage account and excel back and forth in a live mode. https://marketxls.com/, they don't support Tradestation.
You can do it with the Interactive brokers excel spreadsheet that can be found in the supplemental api download.
There are some folks running rotational strategies with excel in Ts. But anyway, It will require advanced coding skills as basically You would need to implement the connector.