Binary call and put
Ideally though also check out a longer-term expiry so that you can see what the asset has been doing over the last several hours or days as well. The best trades are typically when you can get multiple chart time-frames to line up.
For example, you see that the trend over the last several days is up, and the price is also moving up on your tick chart. Sometimes simple is best, but if you want to get more advanced with your analysis you may want to check out candlestick charts.