Know what you are investing in, and know the risk. Bitcoin is speculative and volatile. Buying near $Xk means buying near the highest price Bitcoin has ever been. Some think Bitcoin is going to $X2k; some think it is going to $10. It is easy to get euphoric and think whatever today’s price is a safe bet. Historically that has been true or not depending on the weather on a given day.
Take a look at the screenshot. You can see there candlestick chart. In the upper part of the chart, you can choose indicators and different graphic tools. As for indicators, there are many useful algorithms including the most popular Bollinger Bands, ADX, ATR and the others. Graphic tools are represented by different types of lines and other geometric patterns. Here you can find Fibonacci retracement as well.