It tracks the movement in your prompt to synchronize JMC's tick timer, so when you sleep for ticks, spam enter so that you can catch the movement change.
#action {}{#if {%1 > $move}{#tickon;#tickset;#bell}; #variable move %1}
#action {}{#if {%1 > $move}{#tickon;#tickset;#bell}; #variable move %1>
#action {}{#if {%1 > $mo... etc.
#action {(less than sign)%3hp %2m %1mv(greater than sign)}{#if {%1 > $move}{#tickon;#tickset;#bell}; #variable move %1>