If you've watched a chart for long enough you'll know where it's going next. TA for Hull and bear flags and repeat patterns also make it possible to have a pretty clear idea.
Also depending on how they traded is going to change things. If it was equities, while in a bull market, most are going to follow the trend.. If you just keep longing at 3x leverage for example, even in crashes you won't lose anything...
Technical analysis is really helpful and this is what you need in order for you to have some ideas about the next price movement.
Being aware in the market is essential as it will guide you towards success in your investment.
I'm hoping that you don't belittle the importance of analysis in the market because that will be your basis on what action you are going to do with your investments. Just always observe the charts and make your own conclusion about what is going to happen next so that you can make it profitable for you.