The phrase "from a position of relative" is correct and usable in written English.
You can use it to describe the perspective of or the starting point of a situation. For example: "The negotiations began from a position of relative strength for both sides."
It is a view expressed from a position of relative strength.
Unlike past talks, Europe was this time negotiating from a position of relative strength.
The general is acting from a position of relative strength, despite the two recent assassination attempts.
"This was the time to move from a position of relative strength," he said.
From a position of relative security a few weeks ago, they are now in serious danger of slipping through the trapdoor.
From a position of relative comfort they began to panic, dropping back and conceding free-kicks near their own box with alarming regularity.
And it's helped catapult makeup artists from what was a position of relative obscurity in the 20th century to their own kind of celebrity today.
The earnings revival did not take place just at the banks that emerged from the crisis in a position of relative strength, like JPMorgan Chase and Wells Fargo.
From having been briefly in a position of relative power and influence, he was once again unemployable.
At four months, having flexed the knee fully, he complained of pain deep within the knee, and radiographs showed that the tibial component had subsided from a position of 4º varus relative to the mechanical axis of the tibia to 8º of valgus and appeared loose (Fig. 1b and 1e).
No longer acting as a pure villain, Kain was intended to function as a "steadfast character", coming to the story from a position of knowledge in contrast to Raziel's relative ignorance.
