Options added : symbol to use in calculations, inverting the chart and dynamic zones tags addition. Symbols used can be any valid symbol. If left empty or invalid symbol is entered, current chart symbol is used. Inverting inverts the values using 0 as an axes of inversion (not the dynamic zone "0" in this case, but the "real" 0). After that all the values are calculated (including the dynamic zone 0) Inverting is not limited to "foreign" symbols only. You can invert the current chart symbol too. Here is an example of such a case