Need Content Writer with proven experience in trading/binary options trading writing

I require someone ASAP to help me with a project writing approx 5 articles/week on binary options trading. I have had 2 freelancers on here agree & then disappear. I am looking for someone who is reliable and will deliver within a 48 hour turnaround - including over the weekend. If the first 3 articles go well, I would be able to provide you with ongoing work on a weekly basis. For the initial 3 articles, I will be paying up to US$35/article (US$105). If we come to an agreement after the trial, articles will be up to US$35/article - anywhere from US$105-175 per week. Unfortunately I don't have any more budget so please do not quote me any higher. For this fee, I expect good quality articles that are original & 1 revision.

Details are -
Num. of articles: 3-5 / week
Words per article: 600-1000
Information for the blog/website: Day trading / binary options trading
Topic: Binary options
Tone: Formal/Professional
Outline & Structure: Please only apply if you have experience in writing articles in binary options trading. I am looking for a writer to show evidence of this work before we move forward.

Some research is required but nothing too extensive as there is lots available on the internet. You just need to have experience on the industry - finance, trading, day trading or binary options trading.

Thanks
Extra notes: Budget is for the 3 trial articles - $35/article ($105 for 3)