I read and reread such traders posts again and again. I studied their system but couldnt do 15000 into 3.5 lacs but successfully turned 15000 into 0s. I had a great benefit in doing that. I could carry forward those losses to save taxes later on. Its a good way to save taxes.
There are people on this forum, who show people how to turn 15000 into 3.5 lakhs in ONE day. So, I will assume, with such calibre of traders here, it should be quite common. Though I don't belong to this Super Duper traders category.