Inclining Trendline
A straight line usually drawn to define an uptrend against or through price bar lows.

Declining Trendline
A straight line usually drawn to define a downtrend against or through price bar highs.

Support
A horizontal floor where interest in buying a commodity is strong enough to overcome the pressure to sell. Therefore a decrease in price is reversed and prices rise once again. Typically, support can be identified on a chart by a previous set of lows.

Resistance
A horizontal ceiling where the pressure to sell is greater than the pressure to buy. Therefore, an increase in price is reversed and prices revert downward. Typically resistance can be located on a chart by a previous set of highs.