Bash Script monitor to get ETH pricing and compare if pricing is going down.

monitorIfpriceGoesDown.sh

#!/bin/bash
#This script gets a minum percent as a warning threshold for monitoring ETH value in USD decrease.
#Receives 
# {
#    "ask": 156.36401186,
#    "bid": 156.08050201,
#    "high": "160",
#    "last": "156.38627418",
#    "low": "125.27376294",
#    "timestamp": "1495427025",
#    "volume": "24449.61369000",
#    "volume30d": "307424.31339500"
# }
result=$(curl -X GET https://cex.io/api/ticker/ETH/USD)
percent=${1:-0} #Set to first argument or 0  
echo $result |tr -s ',' '\n'
last=$(echo $result|tr -s ',' '\n'|grep last|cut -d':' -f2|sed -s s/\"//g)
low=$(echo $result|tr -s ',' '\n'|grep low|cut -d':' -f2|sed -s s/\"//g)

lastToLowProximityInPercent=$(echo "($low*100/$last)"|bc)

echo "Last price is %$lastToLowProximityInPercent close to slowest value since yesterday and you set %$percent as threshold" 

if [ "$lastToLowProximityInPercent" -lt "$percent" ];then
 echo "Failure" 
else
 echo "Normal " 
fi