The lows and highs on a candle chart keep overall getting higher. There is no guarantee this will always go up, but whenever the company keeps adding value or people keep seeing it as valuable, it will be worth steadily more long term.
Any time it rises or falls faster than the market is comfortable with, the market will adjust itself. If the price skyrockets in a few days, it'll probably overextend and adjust down in a harder bear trend for a few weeks - before repeating the cycle again (hopefully at higher prices).
Youtube is your best friend for learning when to buy and sell! Tons of free investing education videos on there.
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