However some warning signs are apparent. The is low, but also below 50, warning of potential further weakness. If support at 12000 is broken could head below 30. This would become a safer place to purchase, or second purchase area if the initial buy is taken and stop activated (Watch money / risk management).
Similarly, if support is broken and price continues to move down passing the green MA (100 day) then even further weakness could threaten the rally. The significant area to watch would be the red MA at 200 days. This has not been broken for some time. Breaking this level could warn of the end of the rally and opportunities to shorten.
Currently the fundamentals of bitcoin also draw some concern. The transaction time and pending transactions indicate serious congestion. Coupled with a weak price suggests waiting for congestion to quieten down before buying.
Looking at the chart and fundamentals there is possibility that current weakness will endure, causing some sideways movement or even further dips. These should offer opportunities to buy at lower prices, however keeping a close eye on the transaction congestion to make sure it doesn't get worse, or heavy selling might catch on if critical levels are breached.