Die Roller Instructions:
Basic syntax: NdX, where N=number of dice and X=type of dice. For example: 1d20 or 5d6.

Operators: +,-,*. These mathematical operators add, subtract, or multiply the expressions they stand between. For example: 1d20+5, 1d6*1d4, 5d4-5.

Flags: e,h,l,r,s,v,x. tell the roller to explode, keep high, keep low, reroll, make secret, report verbose, or repeat a dieroll.

Explode: The e flag instructs the roller to inspect the die result and if it is the maximum value possible, roll the same type of die again and add the results. This could result in infinite recursion. Takes an optional number value following the flag that instructs to 'explode on this number or higher'. Examples: 1d10e, 1d10e8.
Note: you can only explode on the 'high-half' of a die roll.

Keep High: The h flag takes an optional number (x) following the flag and instructs the roller to inspect the result rolls and keep only the highest (x) roll results from the result set. If no number is passed with the h, then only the highest single result is kept. Examples: 4d6h3, 2d10h.

Keep Low: The l flag takes an optional number (x) following the flag and instructs the roller to inspect the result rolls and keep only the lowest (x) roll results from the result set. If no number is passed with the l, then only the lowest single result is kept. Examples: 2d10l, 6d8l2.

Reroll: The r flag takes an optional number (x) following the flag and instructs the roller to accept only a value higher or lower than (x). If no number is passed, then (x) is set to 1. If (x) is in the lower 1/2 the die range, then any result less than or equal to (x) is re-rolled.
If (x) is in the higher 1/2 the die range, then any result greater than or equal to (x) is re-rolled.
Examples: 1d8r1, 4d6h3r1, 1d20r20

Secret: If the s flag is present anywhere in the roll instruction, the entire roll is secret. The reason text will not be highlighted and the show rolls panel will only be visible to the post owner and moderators. Note that DMs and moderators can see all secret rolls in their forums.

Verbose: The v flag instructs the die roller to output the roll result in verbose form (showing individual die rolls). Example: 5d6h3v (result would be something like 5d6h3v=3,4,5=12).

Repeat: The x flag takes an optional number (x) following the flag and instructs the die roller to repeat the prior instrction (x) times. Example: 4d6h3x6 would roll 4d6 six times, keeping the highest 3 dice from each roll.