From what little I know, I must agree with needing wind, I would add a SMALL breeze from a fan. Also, how many hours/day of light are you giving it? Is it consistent, on a timer?
I'm new to hot peppers, but I know that with other plants that decreasing the # of hours a day of light (slowly) will make the plant start to flower. If you plan to keep it indoors, with it being so tall, I would decrease the time of light by 10 minutes a day for a week or so and start getting some fruit!
I am NO expert, hopefully someone else can confirm this!
EDIT: I mean to decrease the TIME of the light cycle, NOT the intensity of light
What else have you been growing?
What else have you been growing?