This script reads price and volume information for the top 5 coins (on 9 exchanges, a total of 29 pairs), calculates the cummulative upvolume and downvolume according to the Money Flow (MFI) formula, and shows upvolume and downvolume separately on the chart as a green and a red line.
The coins used are BTC, ETH, LTC, XRP and EOS. They are the top 5 coins by daily volume, as of 24th of February 2019.
Because of the many security() calls needed, the script is VERY slow, so have lots of patience.
I find it useful as a broad crypto market indicator - for example to compare the current pump with the pumps in the past.
Can also calculate the aggregated Money Flow (MFI) if you check that option in the indicator's configuration. Make sure to wait for recalculation and rescale the chart afterwards - MFI has a value from 0 to 100 and you may need to zoom in.