..It can have increasing spread and decreasing volume. This means that price is

moving without strong participation and can not be sustained. Due to the lack of participation,

the price is ripe for a reversal.

It can have increasing spread and increasing volume. This means there is wide

participation and price should continue in this direction.

It can have decreasing spread and increasing volume, which means that the supply

and the demand are temporarily stalemated. This is a warning that the direction move may be losing steam.

It can have decreasing spread and decreasing volume.

This to me means that the bar has little participation from anyone and that the market

is dull or congested. "