Since BTC has recently broken the major uptrend (Blue line), we experienced a sharp drop as it's obvious in the chart.
The first stop can be the ~6400 level which is the continuation of recent bottoms.
The next support will be seen at 6000 level that is the latest lowest price.
Next one comes at 5400 which is multi support.
The other possible far support is 4400 fib level from 2015/8/15