How to use Bollinger Bands to assist in judging Chande's first sell, with ETH examples

Generally speaking, when it falls back from the upper Bollinger band to the lower one,
it is transitioning from a super strong area to a general area.

At this time, if there is another rise that makes a new high,
but it cannot effectively return to the super strong area,

then it means entering a medium bearish state,
which indicates that the first type of buying and selling point has appeared.

TradingView Chande theory script - the way of trading,
Prices exceed the upper and lower Bollinger bands, and the Bollinger lines will only show solid lines!
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