Usually my brokerage firm (TDWaterhouse) cancels all orders held by TTDZ and it's up to me to reorder using the new symbol, however, I am still able to put in orders using TTDZ. I suspect by the opening bell that will not be possible. Sometimes this creates confusion for the unaware shareholders who do not know to reconfirm their orders using the new symbol....
I did attempt a new trade using The new ticker and green cures did pop up. So I could've put in an order for GRCU for Tuesday, but it has no updated bid/ask price yet. So you simply put in a limit order at a price you're comfortable with or where TTDZ closed ( .023).
My guess is that we see some funky price action pre market on the L2 while this gets sorted. I wouldn't be surprised if we saw mms shake the tree a bit Tuesday morning.