[Gretl-users] Create a dummy

I am working on oil prices "WTI" Is it possible to create within Gretl a dummy that takes the value 1 when WTI goes up and 0 when WTI goes down? For example within Excel for a column A that contains WTI it is something like IF(A2>A1,1,0). Thank you, PG *Periklis Gogas <http://www.econ.duth.gr/personel/dep/gkogkas/index.en.shtml>* Associate Professor of Economic Analysis and International Economics Department of Economics, Democritus University of Thrace Associate Editor - Journal of Economic Asymmetries <https://www.journals.elsevier.com/the-journal-of-economic-asymmetries/> Euro Area Business Cycle Network - Fellow <http://www.eabcn.org/person/periklis-gogas> The Rimini Centre for Economic Analysis - Fellow <http://www.rcfea.org/component/option,com_frontpage/Itemid,1/> The Society for Economic Measurement - Member <http://sem.society.cmu.edu/home.html> Institute for Nonlinear Dynamical Inference (INDI) - Charter Fellow <http://icemr.ru/institute-for-nonlinear-dynamical-inference/>