i not understand

this ELA code

-----Functions Used in the Code---------



{---Function MaxTradeClose---}



if marketposition <> 1 then MaxTradeClose=-999999;

if marketposition=1 and C>MaxtradeClose[1] then MaxtradeClose=C;





{---Function MinTradeClose---}



if marketposition <>-1 then MinTradeClose=999999;

if marketposition=-1 and C<MinTradeClose[1] then MinTradeClose=C;



{---Function MaxTradeHigh---}



if marketposition <> 1 then MaxTradeHigh=-999999;

if marketposition=1 and H>MaxtradeHigh[1] then MaxtradeHigh=H;





{---Function MinTradeLow---}

if marketposition <>-1 then MinTradeLow=999999;

if marketposition=-1 and L<MinTradeLow[1] then MinTradeLOw=L;