The 'Tick' is a computerized calculation of the net difference on the NYSE between all last sales on upticks (or 'zero plus' ticks) versus all last sales on downticks (or 'zero minus' ticks). As an example, if all the last sales showed 400 on upticks and 200 on downticks, the Tick would be +200. Some technicians use it as a trend-trading snapshot of advances and declines by monitoring the minute-by-minute fluctuations. A Tick reading under 200 in either direction is relatively insignificant but when it exceeds 300, a good indication is given as to the next important near term move. When Tick moves to an upside extreme (+700 to +900), a bearish signal is given; the rally generating the upticks is approaching overbought conditions and is ready for a consolidation. On the downside, a negative Tick in the -700 to -900 range indicates the selling trend is approaching a climax.

Tick can also be used for short to mid-term trading signals by charting a 10-day closing Tick against the major market averages. When Tick moves above the zero line, a favorable indication is given. When it remains in step with the advancing index, that's also a bullish signal. When the Dow (or other leading average) continues to achieve new highs while the Tick diverges, that's a bearish warning; a short-term top is indicated. The reverse is also true; if the averages move lower while Tick diverges higher, that's a favorable near term indication. Tick can also be used as a short term overbought/oversold oscillator. When Tick nears a reading of +250 (on a 10-day basis), that signals an overbought market, while a reading near -300 indicates an oversold market.

'Trin' is an indicator that combines the component of volume to advance/decline statistics. The formula is very simple; divide advancing issues by declining issues to generate the numerator of the equation (A). Then divide upside volume by downside volume for the denominator of the equation (B). Trin is equal to A divided by B.

When TRIN is below 1.00, this indicates that declining stocks are attracting more volume than advancing stocks; a negative reading. On a daily basis, a TRIN below 1.00 is favorable and a reading in the range of 0.70-0.80 is very favorable. Trin is also tracked on a 10-day basis to determine the overall market trend. If the 10 day moving average drops below 0.80, that's an important overbought signal. In contrast, when the indicator moves above 1.20 (on a 10-day basis), that's an oversold signal.