請問大戶買賣力用警示抓出翻紅翻或翻綠要怎麼寫

下面這是系統自帶大戶買賣力的寫法，想請問用警示，抓出大戶買賣力翻紅翻或翻綠要怎麼寫?

謝謝。

{"大戶=特大單+大單，資料為開盤迄今的累計張數"

支援商品：台(股票)}

if barfreq <> "Min" and barfreq <> "D" and barfreq <> "AD" then 

raiseruntimeerror("僅支援分鐘與日頻率（含還原）");

value91 = GetField("賣出特大單量");

value1 = GetField("賣出特大單量","D") + GetField("賣出大單量","D");

value2 = GetField("買進特大單量","D") + GetField("買進大單量","D");

value3 = value2 - value1;

plot1(value3,"大戶買賣力");

plot2(value2,"大戶外盤量",checkbox:=0);

plot3(value1,"大戶內盤量",checkbox:=0);