Frequency of trade

please i am a day trader and trade off the 15minute chart.my question is, after entering a trade how often do i have to check my trade. that is how long do i have to wait before i go back to my system.

you mean re-enter with the same setup? wouldn’t that depend on your strategy?

Do you set your TP and SL when you enter?

I hope that you are only trading a demo account. Stop trading completely and learn how to trade before you continue. From this and your other post it is clear that you do not have a working strategy. You should complete the school of pipsology and refer back to it frequently. Then find a method that suits you, there are many available here for free and have active trading threads where there are traders that will help you. Learn patience, money management and good r/r. Trading is simple but not easy, all the education you need is available here for free but you must be prepared to learn if you want to become a trader.
best regards

That sounds kind of harsh to me.