Thank you for this information. We confirm this bug and are going to fix it. But unfortunately this fix won't be included in MultiCharts 2.1 because we have begun testing this beta-candidate version. It will be included in MultiCharts 2.2.
Kate and TSSupport,
Thanks for the confirming of this reported bug ( that I might label as Multiple-Plots-In-Same-SubChart-Scaling 'bug').
Please note that this issue of scaling (and scale-origin) is encountered in both symbol-price charts as well as indicators that are not plotted in price-units.
In the case of price-unit charts, it is, of course, ESSENTIAL that both the ORIGIN and SCALE for all superimposed plots are the same. BUT, In the case of super-imposed mixture of symbol-prices from DIFFERENT symbols, then there should be different scales provided (e.g., on the Right and Left sides of chart?, as specified by the user).
In the case of super-imposed indicators in the same sub-chart, the user should have the OPTION of specifying if the added indicator should 'share' the same origin and/or same scale as the existing indicator (e.g., two indicators such as oscillators may have a shared-zero-line as the 'origin', but they might have a different scale and both scales should be separately displayed rather than 'shared' as the same scale.
I happen to be aware of only one software company that has implemented this scaling and origin issue in a 'correct' manner, e.g., Equis Metastock. If you have access to that software, please suggest that the designers look at their design/implementation as a specific example or model for this issue.
There might be others, but I am not currently aware of any.
Looking forward to a re-designed approach to the plot scaling/origin issue.