Linux shell script to monitor / watch the high cpu-load and send email

I need to monitor CPU load and send an email alert. This works but receiving mail for low cpu as well. Please update me where is the issue.
My bash shell script is as follows:

#!/bin/bash
# Shell script to monitor or watch the high cpu-load
# It will send an email to $ADMIN, if the (cpu load is in %) percentage
# of cpu-load is >= 70%
HOSTNAME=`hostname`
LOAD=70
CAT=/bin/cat
MAILFILE=/tmp/mailviews
MAILER=/bin/mail
mailto="skrishna1@xxx.com"
CPU_LOAD=`sar -P ALL 1 2 |grep 'Average.*all' |awk -F" " '{print 100.0 -$NF}'`
if [[ $CPU_LOAD > $LOAD ]];
then
 PROC=`ps -eo pcpu,pid -o comm= | sort -k1 -n -r | head -1`
 echo "Please check your processess on ${HOSTNAME} the value of cpu load is $CPU_LOAD % & $PROC" > $MAILFILE
 echo "$(ps -eo pcpu,pid,user,args | sort -k 1 -r | head -10)" > $MAILFILE
 $CAT $MAILFILE | $MAILER -s "CPU Load is $CPU_LOAD % on ${HOSTNAME}" $mailto
fi

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