Drawdown and Date Generation

Hey guys! Trying to create a formula to measure the starting date for a drawdown period from all-time highs.

In the excel you see in column E is the index price levels. I want to measure when the drawdown is -5% or more and capture that specific start date and put it in a table. I have a forumla to get the drawdown from the all-time high level in F and G, but not sure how to only get the starting point when the -5% drawdown starts. When it gets back to 0%, that would be the reset. Also then in J I want to caputre all the starting points where a -5% drawdown starts.... Maybe someone can help.