I owe some apology here regarding margins and TD systems and GTC orders.
OTC stocks on TD are called "non-marginable securities" meaning you must have cash to purchase as I did years ago. Can't buy those on margin. Those "owned" shares like any other, you can place a GTC order for future date no problem, TC cannot sell/loan those to others. But in your account values on right screen, those profit gains do not show as realized until you sell the "owned" shares. Confusing yes. A gain/profit is a gain/profit, right..?
Now, if you buy non-OTC stocks (on margin) which you can do with their margin account, then the values (stock buying power) will show in right screen only for those as they gain/profit.