Horizontel lines on metatrader 4, please help

Please can someone help. Just started using metatrader 4 supplied by pepperstone. When I draw a horizontal line to show support or resistance on one chart like AUD/CHF, it also shows up on another like USD/CAD. How can I stop it doing this? I’ve tried searching through the help guide without any luck. Thank you in advance.

Are you opening new pairs in their own window?

for example:

No I wasn’t. Didn’t realise you had to but tried it and it works fine now. Thankyou very much for the fast reply. Much appreciated. Have a good weekend.