MT4 vs Thinkorswim

TOS was my first platform and I've grown quite fond of it over the years. I'd like to switch to some of the better, less expensive FX brokers (not many options for U.S. traders) but I'm not sure if the other platforms have the same capabilities of TOS - I know some have options that TOS lacks. I need my trading platform to:

1. Be able to display on two physical screens and display two separate time frames (ex. 4HR and 1 Day)
2. Be able to save drawings and Fib extensions in the daily time frame, then bring those same drawing in on the 4 HR screen
3. Be capable of setting alerts for drawings, indicators and price levels
4. Sync cursors to BOTH screens, Ex: pointing the mouse to the 1pm 4/12/17 candle on the 4HR chart will also display the cursor at the 4/12/17 candle of the Daily chart.

I'm not familiar with MT4 but it seems to be the one platform that EVERY broker (except TDAmeritrade) uses. Is it capable of doing the above?

Here's my 2 cents. I like both platforms and both have strengths and weaknesses. MT4 is not found at every broker. It is common among offshore forex brokers, but not universally supported. MT4 will likely disappear in favor of MT5 in the coming years. MT4 does several of the things you mention with addons.
1. There is an add on to have separate windows.
2. Only if on the same chart.
3. Indies-yes, price-yes, drawings-with addons
4. No.

Keep your TOS and get free demo with MT4from any broker do the study see if you like it .... I have both use both for def reasons...You could do your study on mt4 and buy sell on TOS