I don't know if this is the place to ask this question or not, but I found a site, www.portfoliovisualizer.com and like the feature under timing models called core-satellite. It allows you to compare and weight a static portfolio (core) with a tactical portfolio (satellite) so you can build a core portfolio with say 10 etfs weighted each 10%, and then build a satellite portfolio with a different set of assets that trade on a moving average crossover. You can then combine the two with say 50% core and 50% satellite and it will run the portfolio backtest and give you the analysis of how each did compared to a benchmark and also how the combine strategy did.
My question is, is there anyone in this community that can build me a site with just this feature? If not where should I start?