Algorithm development

I have 7 lines (plotted and as data) and need to develop 7 (or 4) algorithms which hit these data points. Data for algo development can be provided in exel or txt format. This is not an impossible task but the algorithms have to be simple. You should be able to express the algorithms in Tradestations Easylanguage Code (comparable to exel) or other function code. You can see a graph showing the data and the algos which has to be developed on the picture. Closer information upon request.