What we can learn here is that if you look at longer frames like hourly and 4 hour you'll see an overbought condition on hourly and a push outside upper Bollinger Band on 4 hour. Both of these therefore need a bit of a pause in order for time to catch up. Thus you see the reduction of range between signals while the market rectifies the longer frames. Make no mistake though--Until proven otherwise, the buy signals have more potential to make bigger gains than the sell signals.