Your S$980 weekly takings are solely from Forex or combine with MSCI Index profits?
Scalping is very time intensive and not suitable for people with full time jobs. Scalping with 0.1 lot is very hard work. Scalp for more than 12 hours if can earn US$50-80/daily considered a good day liao.
2 months ago ever since I hoot standard lot scalping the profits increased tremendously. One day kio peanut pips also not bad. Eg. 20 pips = US$200.

However need to have ample margin. As time goes by I will increase the size of my balance sheet gradually.
By the way I have mentioned before that my foray into standard lots is due to a 'fat finger' mistake. Key in wrongly and open a US$150,000 contract! It was a blessing in disguise as otherwise I would still only whack mini lots.
Initially seeing your position down by a few hundered USD in just a few minutes can be very distressing. After I crossed this line my risk appetite increased. So far so good as long as I don't touch GBP. Pui, pui, pui!
All the best to your experimentation.