What you might be hearing is the negative effect nolvadex can have with tren. Nolva can actually make you more sensitive to gyno on tren. Its possible. Normally, Nolvadex is not what we would want to use for general on cycle estrogen control anyway. I would opt for arimidex. Dosing will depend on your body. Everyone is different. Only on cycle labs would be able to tell you for sure if you nail the dose. You could do .5mg 3x wk and see how that goes to start. If you are dieting down, you could push for slightly lower estrogen to get a hard drier look