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This is a very basic thing but I am just beginning and I can't find the solution. When I increase the iframe width and height, the outside frame gets bigger but the graphs itself stay the same size. I read in a forum that suggests "auto" sizing feature by changing the iframe's src URL to something like the following:

http://thingspeak.com/channels/423600_ID/charts/2?width=auto&height=auto

I did and the size of the graph did scale well. However, the Number of entries to retrieve is default, which 100. Which means that after the first 100 points, as more entries comes, the first ones disappears. Please how can i increase the number of entries, lets say to the maximum?

Thank you in advance.