在股市，股票的主升浪的本质是什么？

SUM((IF(((WA1/8>20) AND (CLOSE>(REF(CLOSE,1)))),WA1,0)),0);
WA3:=SUM((IF(((WA1/8>20) AND (CLOSE<(REF(CLOSE,1)))),WA1,0)),0);
WA4:=SUM((IF(((WA1/8<20) AND (CLOSE>(REF(CLOSE,1)))),WA1,0)),0);
WA5:=SUM((IF(((WA1/8<20) AND (CLOSE<(REF(CLOSE,1)))),WA1,0)),0);
WA6:=((A2+A3)+A4)+A5;
WA7:=IF((ISLASTBAR),((100*WA2)/WA6),0);
WA8:=IF((ISLASTBAR),((100*WA3)/WA6),0);
WA9:=IF((ISLASTBAR),((100*WA4)/WA6),0);
WA10:=IF((ISLASTBAR),((100*WA5)/WA6),0);
机构买盘:=(WA2);
机构卖盘:=(WA3);
散户买盘:=(WA4);
散户卖盘:=(WA5);
DRAWTEXT_FIX(1,0.752,1-0.088,0,STRCAT(STRCAT('【机构买盘】',CON2STR(机构买盘,2)),' 万')),COLORRED;