The phrase "almost on target" is correct and usable in written English.
It can be used to indicate that something is close to being accurate or successful, but not quite there.
Example: "The team's performance was almost on target, but they still need to improve their accuracy in the final quarter."
Alternatives: "nearly accurate" or "close to the mark."
One-time England international Davies, one of three debutants in the Preston line-up, was almost on target inside two minutes, as winger Lee Holmes tricked his way past Danny Batth and stood up a cross that was just too high for the veteran forward.
H.D.S. Greenway is almost correct in giving the world's health authorities a high grade for their response to swine flu ("Crises without borders," Views, May 6), and his analogies to terror and economic crises similarly are almost on target.
Torres caused problems with his pace and was almost on target early on only for Jose Fonte to get a crucial touch on to his shot from edge of the area and deflect it just wide.
In the event, the probe landed almost exactly on target.
But the throws, tight spirals, were almost always on target.
The first successful landing on Mars since 1997 had touched down almost exactly on target.
The Enola Gay, with a crew of 12, carried out a flawless mission, delivering the bomb on time, almost precisely on target and with no opposition from Japanese fighters.
But, Stone writes, "To the amazement and irritation of employees, Bezos's criticisms are almost always on target".
Therefore the facility ran smoothly from June 18th to November 3rd 2008 delivering almost 2.0⋅1019 proton on target.
The two neurotransmitters that are used most widely in the vertebrate brain are glutamate, which almost always exerts excitatory effects on target neurons, and gamma-aminobutyric acid (GABA), which is almost always inhibitory.
That cameo seemed horribly emblematic of a thoroughly underwhelming opening half which ended unadorned by a single shot on target, but almost imperceptibly something was shifting, and Klopp's demeanour slowly shifted from jovially laid-back to scratchy and irritable.
