Relative value trading TAS and EDE, page-17

I have been trading the relative values of LYC, Lynas, and DRE. I chose them based on the way I saw LYC years ago and have held LYC on and off for some time. I see DRE is in the early stages of rare earth prospecting.

I started off with a ratio of 150 to 1. It is now around 400 to 1. I no longer use ratios but I trade on the basis swing. If one goes up and the other goes down I do two swap trades. I aim to buy back 10% more on the back-and-forth trades. It is still working. I'm not achieving the 10% but am averaging around 4.5% after brokerage.

I'm open to suggestions as to another two shares that may also fit into this type of trading. I'm trying to find a "companion" for SYA ? One advantage is that it matters zilch whether or not the overall market is rising or falling.