Nifty at present looks vulnerable for upside until it crosses and sustains above 23670. Once it crosses and sustains above 23670, we can expect good momentum up to 23900-24100 . On the downside, on a breach of 23270, we can expect sharp momentum on the downside up to levels of 22800-500 . Expect high volatility in the first half of the week . All levels are marked in the chart posted.