StageInvesting +Elliot Waves

Hello Stageinvesting, wanted to know your views on ETF investing/trading.

Strategy where one buys ETFs based on charts with having broad view on fundamentals of the sector. Similar to TechnoFunda but only limited to ETFs.

Something similar to this as well: Momentum based ETF rotation - Amazing backtested results - Need Reviews

If you could share any resource on the same that will be great.

Regards.