Ok, this means zorro do not consider current candle. These are the differences with mt4 that lead me into a traps. I worked about 10 years with mt3/mt4.

however, I get almost the same differencies about what zorro reads and what Trading Station tells:

function run()
{
BarPeriod = 30;

printf("\n\nOpen = %.5f", priceOpen(0));
printf("\n\nClose = %.5f", priceClose(0));
printf("\n\nHigh = %.5f", priceHigh(0));
printf("\n\nLow = %.5f", priceLow(0));
}

Zorro:

Open = 1.30668
Close = 1.30649
High = 1.30675
Low = 1.30633

Trading Station:

Open = 1.30592
Close = 1.30627
High = 1.30651
Low = 1.30550

Sorry, but I don't understand why these are differencies!!!