XMR has been trading inside this channel for over two weeks now, ranging between ~230 and ~280. During BTC's fall recently, XMR has been trading relatively steady without losing too much value.
With XMR failing to stay above the 280 resistance, the most recent bearish move from BTC might actually send the price downwards towards the channel support.
Keep a close eye on the 260 support area, which has currently been holding. Always keep an eye on BTC when trading alts.