Once your payment has been processed and we've received your additional information it might take up to 24 hours to get you set up. When you've been set up you will find TrendMaster and all of our other products (if you've purchased a higher subscription tier) in the Invite-Only Scripts section.
Clicking it will add it to your chart immediately. You can have up to 3 indicators on your chart when you're using the free TradingView plan. There is no need for a higher/paid TradingView plan when it comes to using TrendMaster.