BTCUSD RSI Indicator applied

During the bubble of price of BTCUSD at the end of 2017, the chart of BTCUSD went into an overbougt (above 70 on RSI). Same condition noticed in Jul 2018 (arrows pointing right). An oversold condition is shown by the oscillator on feb 2018 (slightly avove 30) and june 2018 (bellow 30). (Arrows pointing left).