run_perso.sh and run_pro.sh : run the rebalance, and buy/sell for two portfolio
run_test : perform a test and send an email if something is wrong

you can crontab like this :

00 12 1,3,5 * * /home/ibbot/github/ibbot/run_perso.sh 
00 12 2,4,6 * * /home/ibbot/github/ibbot/run_pro.sh 
00 07,21 * * * /home/ibbot/github/ibbot/run_test.sh

perform a test before running the buy/sell
perform another test 1h before the market is closed in order to correct things if needed

or if you use dashboard functionality :
15 18 * * MON /home/ibbot/github/ibbot/run_dashboard.sh