Upgrade existing Tradingview Pinescript indicator.

I need you to add plotting two line to existing indicator developed for Tradingview platform.
BOS - Break Of Structure lines. Trend break.

We are interested in the last labels LL / HH when determining the trend. It is UP trend if the last label was HH.
It is DOWN trend if the last label was LL.

BOS line plotting conditions when trend changing from down to up:

• If price made new high which was higher than previous LH after last LL label than we need to plot BOS line as at the picture below.

BOS line plotting conditions when trend changing from up to down:

• If price made new low which was lower than previous HL after last HH label than we need to plot BOS line.