To know the market price you most subscribe to some populars trading site and
https://coinmarketcap.com. I believe most of the first hand information are provide there and you can used the site to analyze trend and invest along the lines.
We need to learn to write our own technical analysis, at least you don't have to rely to someone and make the decision if you are going to buy or sell. And as you go along, you might improved your skills after so many mistakes and it will make your trading journey very easy.