Made to make it easier to count Elliott waves.
If you renew your new high price, you'll continue your new high price
When the new low is renewed, the new low is continued.
If you are within the range of the previous candle, use the ratio of the difference between the median value of the previous candle and the closing price of the current candle to determine whether to continue the high or low price.
If a can with a tail that updates a new high price and a new low price at the same time comes out, the phrase "Check_candle!" appears to mean that you should check it with a lower time zone candle.