Creating of script for Metatrader4

I´m looking creating of simple of script which would to compare data of two platforms and when the script has found difference between the data of two platforms, so it should to count number of difference. The number of difference should to show in statistic table in each chart of each platform.

I can to provide the formula for searching and counting of difference between the platforms. In the script should possible to set a minimal difference for searching between the data.