Trendline support on daily time frame of BTC

If you closely observe the chart of Bitcoin then you will find that it has retested the trendline and is taking support as well.
Apart from this, it had also resisted at the RSI level, signaling that it can move a little bit down but the question arises how much?
To find the answer of how much, you can take the help of Fibonacci retracement that would give the desired levels for the retracement.