dear editor, i want to say something on behalf of my classmates about the food and water shortages being experienced in many parts of the world. what should be done to deal with the problem?on the one hand,we should focus on environmental protection and imporve our treatment of ... 20210311
a1:=ma(close,n);a2:=ma(close,n1);a3:=ma(close,n2);a4:=ma(close,n3);xg:=close>a1 and a1>a2 and a2>a3 and a3>a4 and close>open;sc:=if(xg=1,barslast(xg),0);dj:=ref(l,sc);if(xg=1,dj,draw**)...