Space calculator is the world's first calculator used to calculate the possible price changes of the BTC.
It can also be used for the price calculation of any other investment goods such as shares,futures,gold,etc.
Also,it is free,and so simple.
You just choose the highest point of X and the lowest point of Y, input the values of X and Y in space calculator, click the "Calculate" button, and you will get the answer.

More,see
http://www.kjjsq.com/en.htmlI don't think the algorithm that gives out the result considers the basic points that actually matter to bitcoin price change, bitcoin price does not go by any pattern, its not like you can predict tomorrow by knowing yesterday's price only. There are many other/unknown factors that matter.
Which no one actually know for sure. So I'd not be interested in this prediction.