I like to look at the chart history for the coin first.
Look to see if there is enough volume on both the buy and sell sides, to make sure you can probably make trades when you want.
Then pick my prices basted on that info and the chart for the day.
The chart is just a basis of our decision in trading but the emotion is vital to make it work, when we are affected that
things are not going based on our prediction, we might make a decision based in our heart which is suppose to be coming from our brains.
I can't control the decisions that occur when my lust is overwhelming, I lose a lot, but once I understand the graphics movement analysis,
I've been able to be more patient, I control with the notion "there is no great advantage if small profits are seen"