Problem with charts in report studio

[eventob]

Hi

I'm trying to make a line chart with fund price along the y-axis, price date along the x-axis and fund name as the lines. I manage to make a graph, however I get a label for every day on the x-axis, and I only want one label for each year. I can not find a way to manually control the labels, so that I only get one label for each year. If i write year(expression), i get the year as label, but then I dont get all the points on the graph.

Also, is there a way to make logarithmic scale with other bases than 10?

Thanks in advance.