There is no undervalued project. As for it to gain in market value people have to decide that it is worth what it is worth. There are some projects that in my opinion shouldn't be in top 50 such as tron and verge for instance (there are others as well, don't get me wrong here). Mostly what you will see is when some coins get pumped hard and thus you can see by the chart that it can be overvalued by simply looking at charts. Or yet watch for projects that have an idea but not working product as they are useless until their project get lunched.