In her summing up at Rochdale Coroners Court, Senior Coroner Joanne Kearsley reminded the jury of evidence about observations on the night Charlie died.
The jury had heard that staff knew he was at risk of self-harming when he returned to the ward after a period of leave at home.
The jury was asked to consider if Charlie and his mother, Samantha Millers, should have had more support from Trafford Borough Council, and if the teenager should have been on a child protection plan.
The members of the jury were also been asked to consider if the observations on Charlie were carried out and if communication between staff was robust enough.
At the beginning of the inquest, Ms Millers said she felt the support her son received “was a mess”.
Charlie was one of three people who died in less than a year at the Prestwich site.
The deaths of Rowan Thompson, 18, Ania Sohail, 21, and Charlie took place in a nine-month period between October 2020 and June 2021.
Charlie’s inquest was adjourned in 2023 after police announced they had started a manslaughter investigation.
The investigation concluded in January with a decision not to prosecute.
Samantha previously told the court that Charlie, who was transgender, had been severely bullied after publicly identifying as a boy from the age of 12.
