Melanie, being from Connecticut, US, her estradiol levels are probably in pg/ml (103) and testosterone levels in ng/dl (350-527). Estradiol in women is all over the place and fluctuates in time. The right amount for you is a mystery and only trial and error can determine this. Individuals vary. Its measurement would appear useless, even according to some study findings. As far as testosterone goes, levels are indeed high for females (less than 100), and in the low-middle range of males (around 300-1,100 ng/dl). Levels will indeed fluctuate, being typically higher in the morning. Also, total testosterone levels are not quite accurate as a fraction of this is UNAVAILABLE, bound to SHBG (which is increased by estrogen). Hence, it would be more useful to measure bio-available or free testosterone.
But I ask you: what do you care more about? Levels or how you feel, breast growth, overall feminization? If these are good, why worry? Interestingly, in this study, feminization was similar despite high, medium or low T levels.
J Natl Med Assoc. 1992 Mar; 84(3): 241–250.
"Despite similar degrees of feminization in all 40 individuals in whom hormonal studies were performed, variable suppression of serum testosterone concentrations was present. Based on their testosterone concentrations while on feminizing hormone therapy, the transsexual inmates could be divided into three groups. In Group I (the "suppressed" group), the serum testosterone concentrations were markedly depressed (less than 10 ng/dL); in Group II (the "non-suppressed" group), the values of testosterone were normal (446 to 1072 ng/dL); and in Group III (the "intermediate" group), the testosterone values were between those of the suppressed group and the nonsuppressed group."