When you are a newbie you can refer to something on tradingview.com
1.Technical:
RSI (Relative Strength Index) (14): RSI <30, oversold => should buy. RSI> 70 - overbought, you should not buy at this time.
Fibonacci: There are Support and Resist. When prices hit the S, P, R levels, the price will rebound, so You pay attention around S, P, R levels.
You should buy (support) and sell (resist) around these areas.
2.Chart:
The result is Bollinger Bands.
You can refer to the Bollinger Bands here:
http://stockcharts.com/school/doku.php?id=chart_school:technical_indicators:bollinger_bandsThese are just some of the simplest indicators for beginners to trade as they are to have safe levels, avoid losing money.
I am also a newbie sharing knowledge so expect people to help. Thank you for reading

The market is based on supply and demand so obviously you should keep on holding when the market prices are dropping and just sell your coins when the market start's to pump up.