QuillFilter.filter

# Quill18's Simple LootFilter
#   Author:  quill18@quill18.com
#            youtube.com/quill18
#
# Get the latest version here: https://gist.github.com/quill18/d811f616d577bed035b4
#
#  **Installation**
#
#  Copy to:  C:\Users\<USERNAME>\Documents\My Games\Path of Exile\
#     NOTE:  The file MUST have the ".filter" extension.
#
#  In Path of Exile, go to Options -> UI -> <Scroll down to the bottom> -> 
#       Select the filter from the pulldown -> Click "Reload".
#


# We want to see all rares and uniques.
Show
    Rarity >= Rare

# Anything with 6 sockets, connected or not.
Show
    Sockets 6
    SetTextColor 255 0 0
    SetBorderColor 255 0 0 
    SetFontSize 40

# Anything with 5+ linked sockets.
Show
    LinkedSockets >= 5
    SetBorderColor 255 0 0 

# Low level items have fewer sockets, but our new characters might want them anyway.
#Show
#    LinkedSockets >= 2
#    ItemLevel < 15

# Still low-level.  Wiki says 28 is the limit for 4 sockets, but I've seen 4s on iLvl 26 in 1.4 - change this?
#Show
#    LinkedSockets >= 3
#    ItemLevel < 28

# "Chromatic" recipe items.
Show
    SocketGroup RGB
    SetFontSize 30
    SetTextColor 0 255 0
    SetBorderColor 0 255 0

# One-handed items only have three sockets, so highlight anything that does.
#Show
#    Class "Wand" "One Hand" "Claw" "Dagger"
#    LinkedSockets >= 3

# wat?
Show
    Class Fishing Rods

# Highlight must-grab currency.
Show
    BaseType "Mirror of Kalandra" "Exalted Orb" "Divine Orb" "Orb of Regret" "Eternal Orb" "Regal Orb" "Gemcutter's Prism" "Chaos Orb" "Orb of Fusing" "Orb of Alchemy"
    SetTextColor 0 0 255
    SetBorderColor 0 0 255

# Show all currency.
Show
    Class Currency

# Show all jewels.
Show
    Class Jewel
    
#Show all magic and quality flasks.
Show
    Class Utility Flasks
    Rarity >= Magic

Show
    Class Utility Flasks
    Quality >= 1

# Show anything with a quality of 10 or more.
Show
    Quality >= 10

# Show all gems
Show
    Class Gem

# Show all maps
Show
    Class "Map Fragments" "Maps"
    SetTextColor 0 0 0
    SetBorderColor 0 0 0
    SetBackgroundColor 255 255 255

# Currently hunting for better intrinsic two-stone rings.  --quill18
Show
    BaseType "Two-Stone"
    
Hide 

Filter takes only first matching selector. So yours won't highlight high-value currency - it will use previous selector wich tells to show all currency. You may want to use this tool to test your filters. You may also want to look at this filter for ideas.