Four key points about the abomination of desolation in Mark 13

(1) It originates in Daniel — familiar OT imagery to the first-century disciples. (2) From Jesus' perspective it is still future — which supports partial/total fulfillment. (3) It is the sign — not wars, famines, false Christs, or anything else; only the abomination triggers the 'flee' command. (4) 'Let the reader understand' is directed at a future readership — either pointing back to Daniel for interpretation, or an editorial note by Mark acknowledging a future audience; either way it pushes toward future fulfillment. Futurist implication: the sign requires a rebuilt temple.