Some people like indicators, some people don't use them.
But here are a few that I use.
Ichimoku cloud indicator - I often hide this so I can get a clear picture of whats going on.
Bollinger Bands - Helps keep you thinking about where is a good range to buy/sell.
MACD Custom - Good for helping know when a trend begins or ends.
Finally for buying and selling don't forget to identify major support/resistance (big bounces).
Also you can invest in percentages like from 80% to 10% depending on how confident/ and low on the chart you are.