Bad news, securities account is in USD only and for the remaining :
"In the Futures account no conversion takes place. The profits are left in USD until they are removed from account; at which point they can be sent to you via USD or any currency of your choosing. Thatâs when an actual conversion takes place and it is done based on the transferring bankâs spot rate exchange.
For Forex, the same rule applies; except the profits are placed in account as the delivered currency. "
So it's much better to wire in USD as other currencies will have little use for one trading mostly the US market (also it's 35usd for international wires out, so if you can convert all in 1 currency, you have to pay this fee, and intermediary bank as well as beneficiary bank fees) for each currency.
Also margin rates are outrageous, so paying them to trade in USD while GBP/HKD/EUR/AUD etc... stay idle on the account is most frustrating. Considering the securities, futures and forex account are separate and one has to take care of keeping a minimum in each, and risk a liquidation if one goes below the margin limit while others are overfunded, the funding issue appears a major hassle.
If anyone here has experience to share on the topic with Tradestation, please do share.