This is a strange one, if you order and price goes UP, then you keep your order and the price you ordered at locks in unless you choose to cancel your order, then you have to re-submit at the new price.
Now, this is the kick. If you order and 'lock in' at a price like it is now, even if price goes down, you'll still be locked in. However, it's at this point that you have to evaluate if cancelling your order, and being positioned at the BACK of the queue is worth the difference in price. For a couple of grand I'd stay put than to have to wait another year for the car. Saying that, if they suddenly dumped the price by 50% (just for example sake), I absolutely would cancel my order. Not just because the car is half the price, but it's current value if you bought it would completely bone you on its resale value, and residual value, which for me is a very important factor.
The key to Tesla is order NOW and see what happens. If they're saying April 2023 ETA, you really want to be in the queue ASAP, and can always shortcut a car if you have an eagle eye for inventory.