Setting up for a sell

So price caught me by supprise. To be honest i have no idea what's happening, but surely there is a mathematical reason for that. Whatever, if the price ends at $2510 today, i will go for a hard buy earliest in moday, when the price has to hit 2530 and head lower. Or it could go straight for 2530 today and start falling in monday. Both cases, price has to be 2530 monday.
Target is $2491, but it think it could easly hit $2446 or maybe even lower in a short period of time.
Good luck