Question

read the source of the allusion.
in the bible, daniel accurately translates mysterious writing that appears on a wall, and in doing so, he predicts the death of a king.
what is the meaning of the allusion in the sentence below?
investors should have seen the writing on the wall.
a sign with important technical information
a clear indication of how something will turn out

Explanation:

The allusion comes from the Bible where Daniel interprets writing on the wall as a prediction of a king's death. In the given sentence about investors, "the writing on the wall" means a clear sign or warning of an impending outcome.

Answer:

a clear indication of how something will turn out