User-defined Scaling
Scaling for the y-axis (price axis) is based on values you enter in the Maximum and Minimum boxes. Any values outside the values specified are not visible.
Slight adjustments to your chart's Minimum and Maximum values might be made in order to display equal increments in the scale. If a study with User-defined scaling shares the same subgraph as another study or data stream, all scaling should be set to User-defined and the minimum and maximum values should be identical.