Given what we know, although this question is missing information as to the direction of movement of the proton, we can still confirm that if the proton is not being deflected, then the electric field is in the same direction as the movement of the proton.
Therefore, given that the electric field will generate the electric force to cause the movement of the proton, and that positive charges will move in the same direction while negative charges will move away, we can confirm that the electric field is in the same direction as the movement of the proton given its positive charge.
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