The professional day traders use the daily chart for most of their day trading setups.
After they have identified a daily chart high probability setup, they switch to the thirty-minute chart for the trading signal before entering the trade on the 5M chart.
Some of them do only look for their trading setups on the 30M chart. Then they will take the signal and enter the trade on the 5M chart. More advanced professional day traders can look for day trading setups on any higher times frame before heading to a lower time frame for the signal and entry.
Really, a professional day trader can combine any higher time frame with 15M, 10M, 5M and 3M charts.
Please understand that I am talking about day trading in its proper sense (not scalping).
In my opinion, the second best time frame for day traders is the thirty-minute chart because most professional day traders do keep eyes on that time frame. It is also a time frame that draws the attention of many technical traders. The third best time frame for day trading is the 2H chart. Both the 2H and 30M charts are used for day trading setups.
Warning
If one is using a day trading system, one must adhere to its rules and parameters otherwise it is not the same system.
Please do not change a strategy that is working for you after a losing trade.