These handy little coins, available in many exchanges help you to "short" a major coin without having to go through the complications of leveraging and borrowing. For example, this coin, available in the Kucoin exchange moves three times the percentage of ethereum in the opposite direction. So, go long on short..... If that makes any sense. This is similar to shorting the actual coin with 3x leverage.
Right now you don't need to draw any fancy lines... or do some sophisticated analysis - as the market direction is pretty clear at the moment....