Most likely he is not talking about actual tools but skills, the most important by far is your ability to set up a stop loss that will automatically close your trade if the market moves against you, this is very important because your goal as a trader should be to remain in the market long enough to capture the big movements, like the one we are seeing now, and the only way to do this is by protecting your capital and keeping your losses as small as possible until you wait for that day.