I'd like to be able to place two currencies on a chart and select a start date to see the percentage difference between them as it changes. Being able to peg them to a set value of a fiat currency as a percentage I think would help easily know when to trade between them. For example, select $10,000USD and see what percentage of that ETH is and what BTC is. This...
If you click and drag your chart to the left, you gain white space that you can use for your projection markups.
Overlaying currencies your are interested in or invested in is a great way to quickly make decisions. By changing the thickness and colour of your lines you can highlight those you have funds in.