Every time the monthly candle opens the price falls. We saw this in BTCBCH a few days ago, and today it happened with Bitcoin.
We saw BCH opening the monthly candle a few days ago. Now the monthly candle has opened in BTC. On BIttrex, the candle in usdt opened yesterday, and in usd it opened today. Shown with the red arrow:
Because BTC fell the rest of the market fell too. BTC will fall a bit more as well due to a candle closing outside Bollinger in 4 hour chart.
BCH is safe.
Just now it gave an inside Bollinger Band closing in fifteen minute chart in BTC. I am positive that BCH will move only up from here in BTC.