No. of Recommendations: 3
Portfolio Visualizer (PV) can back test the Dual Momentum strategy,
and now has end of March 2020 data.

I don't use GEM, just follow it out of interest. 

Here's the results from PV for Jan 2012 - March 2020
Timing Portfolio VTSAX VTIAX
Out of market asset VBTLX

Timing Period months, In or out of stocks in March 2020, CAGR from Jan 2012

Months  Stocks	CAGR
6	IN	6.1
7	OUT	6.1
8	OUT	5.8
9	IN	5.6
10	OUT	9.4
11	IN	4.3
12	IN	6.2
15	IN	5.9
18	OUT	10.7

10 month timing period worked out well. 
12 month timing period is disappointing, kept the portfolio in VTSAX through March, switches out today.
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