When I set conky alignment to 'middle_right', it starts acting an another window and when I maximise other windows, e.g. firefox, it stops and touches with conky boundary.
According to the own_window_type variable description in conky documentation:
if own_window is yes, you may specify type normal, desktop, dock,
panel or override (default: normal). Desktop windows are special
windows that have no window decorations; are always visible on your
desktop; do not appear in your pager or taskbar; and are sticky across
all workspaces. Panel windows reserve space along a desktop edge, just
like panels and taskbars, preventing maximized windows from
overlapping them. The edge is chosen based on the alignment option.
Override windows are not under the control of the window manager.
Hints are ignored. This type of window can be useful for certain
situations.
The use of panel value for the variable own_window_type leads to the undesired behavior.
The value to use for your purpose is normal, so that your conky configuration must have the following lines:
own_window yes
own_window_type normal
