So let me make my opinion on this clear now: I do not recommend this strategy or any other form of market timing. (moneysense.ca)
More importantly, if we constrain long - term timing to one critical decision (when to buy stocks with cash reserves), we can avoid most of the mathematical obstacles inherent to more general forms of market timing. (mindfullyinvesting.com)
Trading ETFs is just the current form of market timing (that replaced the last century's stock jockeys). (toolsformoney.com)