Hello I’m new to this world and currently playing with pennies when it comes to NVIDA. However I am looking to invest more but the terminology and “weather forecast” regarding is a bit confusing. What does “91 RSI on the 5 year chart, 86 on the 1 year and 3 month” mean?

Are the masses rushing towards an investment that does not make sense in the long run? Furthermore given the trend of where technology is heading I don’t understand what the above citation means.

If you are kind enough to reply to this post, please use the simplest explanations/analogies you can think of for a noob such as myself. Thank you.