and fluid 30 this shade being a target color towards which an operator attempts to match the color of indicating area 28 by compressing the container 34 the match color area if opaque will obscure the color of the fluid 30 as observed through the clear upper layer 26 and will match the color of the indicator area 28 at only one degree of compression of the microindicator thus allowing the indicated displacement to be set to a degree of precision not normally attainable by visual means alone the flexibility of the plastic layers 26 and 28 permits the container to bulge out around the periphery of disc 24 in order to compensate for the compression of the container above the disc 24 thus containing the displaced fluid without rupturing the container if desired the lower plastic layer 28 could also be a clear plastic layer similar to the upper layer 26 in this case the color which is intended to show through the window 32 upon the event of displacement would be on the upper surface of disc 24 fig5 illustrates an embodiment of the indicator comprising a container 44 with an upper transparent window or disc 46 a smaller colored lower disc 48 and an accordion like flexible bellows 50 uniting discs 46 and 48 to form a closed container for a light absorbing indicator fluid 52 if desired the window portion may be adhesively secured to wall portions 56 of one of the members whose relative displacement is to be measured since in this embodiment the upper disc 46 may be rigid and is adhesively secured in position an upper window such as window 32 of the fig1 embodiment bearing on the upper.