HOW TO TRADE A DOUBLE TOP PATTERN

Hi, I have a question about the double top.
Assuming as an example that the neckline of a double top is at a price of 50. This is broken by a candlestick where its spike closes at 48 but its body remains at 51.
Now, the question is: does the pattern break happen when a candle closes below 50 or does it have to go above 48 as well having created a new support there?
We are talking totally about technical analysis, nothing more.

Ty everyone.
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