Prevous day close and low

Buy = Open == Low;
Sell = Open == High;
Noise = High > Close;
AddColumn(Open,"Open");
AddColumn(Close,"Close");
AddColumn(High,"High");
AddColumn(Low,"Low");
Filter= (Buy OR Sell) AND Noise;
AddColumn(IIf(Buy,Open,Null)," open=low ", 6.2,1.2,colorGreen);
AddColumn(IIf(Sell,Open,Null)," open= high ",6.2,1.2,colorOrange);

can anyone please add previous low and previous close in this afl

thanks in advance