Candle stick patterns are a very basic form of technical Analysis

Anyone who starts learning technical analysis or anyone who is teaching they start from candlestick patterns.

Doji is a buy

Inverted hammer/shooting star is a sell, it doesn't work at all.

If trading charts was that easy why 90% of the traders lose money?

Look at the charts below for example.

imagine the amount of people may have shorted this coin noticing these hammers/shooting stars.

Or the people bought the other coin just looking at a candle with a long wick.

Do not pay much attention to these patterns. Pay attention to market structure only.

As long as the structure is bullish you don't have to shift your bias and same goes to a bearish market structure.

One candle isn't enough to decide the trend change . Always Wait for the more data.

Keep learning.