For 1. set the trading to complete bars = true so you will trade once per bar, and the maximum open positions to more than 1. I think this is what you are doing, if you don't see more trades probably the trading condition is not right. Please take a look at the rsi example in our example page
http://www.molanis.com/products/molanis ... rs-for-mt42. You cannot do pyramiding.
3. For money management instructions you can read the user guide at molanis.com/support/manuals . we use a similar formula to Lotsize = 0.1 * Account Free Margin / 1000.(it depends on the account type)