hi
pdif_5 gives the price different over 5 mins
tdif_5 gives the tick difference over 5 mins
maxbp_5 gives the maximum
minbp_5 gives the minimum
to find all the variables, just press the yellow question mark at the top right corner of the bot screen
then select index
then type s
then select selection variables
all the info for the selection variables is here , ie silks,back price, lay amount etc
mcbee