I only trade low volume thinly traded coins (account builders) in ranges.. its not predictable enought to try to do that with larger coins like ETH.. they break out of there range too easily.. thats why I trade ETH off bases and panics.. I read the charts and let the chart story tell me what strategy I should be using.. and yup, round numbers are important, because humans are the traders, and thats how they think.. so as an example 200 on ETH was great support in the past