I don't think that's the best format to study the statistics of all assets. This will take too long time. But if you have a specific set of 5-6 assets, it's a great idea to keep track of how long and at what level their price goes up or down. In this way you will be able to fix the main levels in order to work more confidently on long- or short-term deals in the future. It should definitely work on Forex. Although, if you work in some other directions, it will be useful too. It is not necessary to observe the movement in real time. Sometimes it is enough to look through the statistics on charts. Again, the strategy you trade on is very important.